/ham/ Amateur Radio General

[Anonymous No.1768446]

Homebrew Edition
Previous Thread >>1757869

>New to /ham/? Read this!
>n00b FAQ
https://wiki.cybsec.io/index.php/HamFAQ
ftp://ftp.cybsec.io/pub/Cyberpunk/Tech/Radio/radio_FAQ_Preview11.htm

>Online Practice Tests:
http://aa9pw.com/
https://hamstudy.org/
https://hamexam.org/
https://www.laurelvec.com/

> Real-Time Propagation Data
http://prop.kc2g.com/

>Space Weather
https://www.swpc.noaa.gov/communities/radio-communications

>Portable End Fed Zepp
http://www.wa0itp.com/pefz.html

>2m Cu Slim Jim
http://www.hamuniverse.com/2metercopperslimjim.html

[Anonymous No.1768447]

Homebrewing in action
http://www.n6qw.com/

[Anonymous No.1768448]

>Anti-homebrew

[Anonymous No.1768464]

Hey guys. guys guys, can I be in your club? I got some ham gear to!

[Anonymous No.1768484]

Sup plebs,
so since coronachan will soon cause a global societal collapse that will take the internet down with it, now is finally your time to shine!
All these years people laughed at you and called you fags... well nobody is laughing now frens.

Anyway, what is the maximum range of a ham radio? I want to run a quick math to find out how many do i need cover a continent with signal. I want to use ham to transmit data via dialup sounds like they did in ye olden days and that way we can have most of the global internet back.
But that will only work if the maximum range of a station isn't something shitty like 10 miles.

[Anonymous No.1768503]

>>1768484
>Anyway, what is the maximum range of a ham radio?
Tens of meters to global. Depends on the radio, the frequency, the power and the antenna.

[Anonymous No.1768505]

>>1768503
commercial installations don't count they need too much power and specific heavy maintenance
and there aren't going to be any radioshacks around
so we are talking about average enthusiast owned hams that can be powered by solar panels from a roof of an average house

[Anonymous No.1768512]

>>1768484
>>1768505
>It's another: /k/ tourist thinks he's got it all figured out and just has to buy a couple of baomemes run off of solar panels to restore the Internet backbone of North America after society collapses.

[Anonymous No.1768515]

>>1768505
>so we are talking about average enthusiast owned hams that can be powered by solar panels from a roof of an average house
That's exactly what I'm talking about when I say
>Tens of meters to global. Depends on the radio, the frequency, the power and the antenna.

[MrCrummy No.1768517]

Ok my dudes, imma come at you asking for help right now.
I bought a bendix king dmh mobile unit off ebay ages ago and just got around to trying to install it in my truck, but the unit i bought only has the regular mic, not the keypad dtmf mic which is also known as a "programming microphone"
That means that without that microphone or a usb to serial adapter and software, I can't actually program any channels into this fucking radio lol.
The mics go for around 200 each on ebay, or the software is 125 dollars plus the usb to serial adapter, both of those cost more than I paid for the entire radio, if any of you bros either have a link to a copy of the programming software, or know where to get a programming mic for cheaper than 200 dollars, I'd love to hear it.

[Anonymous No.1768518]

>>1768512
where do you live normie fren? when you are lying dead in a puddle of your own torn liquefied lungs i might drop by in my hazmat suit to loot your ham setup

[Anonymous No.1768523]

>>1768518
>drop by in my hazmat suit to loot
You'll be pissing your pants at home until you succumb to the pandemic, get real.

[Anonymous No.1768525]

>>1768517
Isn't that a P25 rig? I don't think you can use it as a regular radio even with the prog cable+software.

[MrCrummy No.1768528]

>>1768525
It does regular old analog according to the manual, just gotta program it as such.
I can't find a programming manual anywhere though, even that's a bitch to find, everyone just says refer to dealer for programming lmao
I found one youtube video on how to program channels but you need the mic.
I wish I knew how much of a bitch this would be before hand.

[Anonymous No.1768544]

>>1768505
see
>>1768503

[Anonymous No.1768545]

>>1768518
I hope you live in that suit and never come out because you could have the virus for 2 weeks and not know it.

[Anonymous No.1768555]

>>1768517
>>1768528
You can program the mic buttons to do custom things (power, C2C, etc.), but you cannot program the radio with it. I'd be willing to bet you need specialized software, beyond CHIRP, to properly set these up. These radios are meant to be channelized for PS use.

[MrCrummy No.1768559]

>>1768555
Huh?
You absolutely can program in channels with the microphone.
https://www.youtube.com/watch?v=_D9MVx9-xxs
Why are you talking out your ass?

[Anonymous No.1768562]

>>1768555
It's definitely field programmable. Flip side is it's a 2k radio now so it's not surprising accessories cost $200.

[Anonymous No.1768563]

>>1768559
>6 minutes to program 1 channel
Why are you here if you already know everything? Have fun emergency field programming with your LARP radio, FL fag.

[MrCrummy No.1768567]

>>1768563
>Why are you here if you already know everything?
Did you even read my post?
I don't think you did.
I'm asking if anyone knows of a place to download the programming software, this is a fairly common radio so I'm thinking the software is out there somewhere on some radio forums, I just don't know what radio forums are popular or would contain more information.
You are mad at me and call me a larp because I just called you out when you provided absolute bullshit "help" in the last post?
Get the fuck outta here and project somewhere else.
Who the fuck instantly replies saying "it cannot be programmed" like they are an authority when they actually don't know shit, then gets mad and lashes out at me when I prove you're wrong.

[Anonymous No.1768577]

>>1768567
It's a commercial radio, retard. You'll find hacks like your shit video, but good luck with anything else.

[MrCrummy No.1768578]

>>1768577
>you can't program it
>yes you can, look
>YEAH BUT THAT'S SO SLOW HAHA
Reply again.

[Anonymous No.1768583]

Enjoy your radio, dumb fuck.

[Anonymous No.1768584]

>>1768484
>Anyway, what is the maximum range of a ham radio?
Check the FAQ.

[MrCrummy No.1768585]

>>1768583
How about one more reply, just one more please, i'd like you to fume a bit more for everyone to see

[Anonymous No.1768605]

who do you actually talk to tho? and about what?
is there any radio group for loli enthusiasts?

[Anonymous No.1768631]

>>1768605
>who do you actually talk to tho?
old guys
>and about what?
radio
>is there any radio group for loli enthusiasts?
look for SSTV

[Anonymous No.1768638]

>>1768631
>SSTV
does fbi monitor those channels?
asking for no reason

[Anonymous No.1768641]

>>1768638
Some people will tell you all HAMs are glow in the dark niggers

[Anonymous No.1768657]

>>1768605
Different strokes for different folks. You're where I was a year ago.
Folks who go four wheeling like it to communicate with each other as opposed to CB radios b/c it's more reliable and higher power.
Others use different components like a free GPS
Others shoot the shit with people around town instead of hearing the same men's vitality commercial on the radio every 5 minutes
Others think it's pretty epic to make an antenna and send your voice halfway across the world.

[Anonymous No.1768660]

>>1768638
just use ham VPN
(route your transmissions through your neighbor's antenna)

[Anonymous No.1768662]

>>1768641
is there any way to prevent glowniggers from triangulating you if you are too cheap and lazy to get a licence?

[Anonymous No.1768663]

>>1768662
I'll triangulate your sorry ass myself

[Anonymous No.1768664]

>>1768663
>n-no you can't join my super sekkret club without buying a special loiscence
are you british?

[Anonymous No.1768665]

>>1768664
It's not a secret club. You just have to learn a couple of things that will actually help you in the activity.

[Anonymous No.1768670]

>>1768484
>maximum range of a station isn't something shitty like 10 miles.

I've got bad news for you, bruh.

Pioneer 2 is transmitting with 10 watts (ten fuckin watts, you read it right) from a distance of 22 light hours (twenty-fuckin-two hours at speed of light).

Fun fact, signals degrade for two reasons:
1) the medium
2) obstacles

If the receiver is on line of sight, 10 miles could easily be covered with less than a single watt output.

[Anonymous No.1768672]

>>1768631
>look for SSTV

lost my sides so hard

[Anonymous No.1768676]

>>1768662
technically you can bump up the frequency to 900MHz and then you are within a legal wifi range where you don't need to be licenced

[Anonymous No.1768678]

>>1768676
oi, mate, here in UK it's called loicence

[Anonymous No.1768693]

>>1768676
If you just need to connect two points you can use a directional antenna
No ham boomers will be able to snitch on you that way since they won't know you exist

[Anonymous No.1768743]

>>1768518
You don't know the /ham/ community at all. Most of the radio amateurs I know are ex military guys, former military Morse code operators. They are perfectly capable of handling /k/lowns.

[Anonymous No.1768759]

>>1768743
yeah, have fun fighting off intruders with your lungs full of fluid when you literally can't even sit up on your own
dead people have no use for ham radios anyway

[Anonymous No.1768791]

>>1768670
Can confirm. Have made long distance simplex contacts from mountains with a Baofeng. Pretty fun, hope to do portable HF this year.

[Anonymous No.1768830]

>>1768665
And let Uncle Sam microscope your asshole.
Free men don't ask permission.

[Anonymous No.1768857]

>>1768662
It would be pretty tough to find someone transmitting on HF, because they could be thousands of miles away.You really only need to worry about it if you're gonna be screeching on a Baofeng and pissing off the locals.

[Anonymous No.1768930]

Anyone know where I can find prepper/survivalist/etc IMG files for Chirp to program into my radio (so I can have a list of juicy frequencies to scan through)
I tried radiofreeq on wordpress but I got 404 on their links.

[Anonymous No.1768932]

>>1768759
This is how we can tell you are a /k/lown,you learn about hazmat, NBC and protection in the real military.

[Anonymous No.1768992]

I did some reading on antennas but no tutorials explain how you actually recieve the signal, they just keep going over the same shit like frequency, antenna length etc, i get that part.
But let's say i want to spy on glowniggers who use FM, so i get two L shaped pieces of copper wire 1.5 meters long and then what?
will the radio waves impacting this wire simple cause electric potential between the two pieces of wire that i can measure and thus reconstruct the shape of the sine from it? (like + and - to get a voltage from a battery), what sort of voltage range are we talking here?
And how do you hone in on a specific frequency? because the antenna is just a piece of wire so it will pick up literally every frequency around there

[Anonymous No.1769004]

>>1768992
wait i just realized that since the signal is just a sine that means i can use a simple band pass filter to remove any freqeuncies higher or lower than mine
i have to try that shit when i get home, i wonder if an ordinary op amp like lm324 will be good enough to be able to amplify the sine from an antenna to the point where i can actually reasonably work with it, so say to 1V amplitude

[Anonymous No.1769018]

>>1768992
>voltage range
µV

[Anonymous No.1769020]

>>1768992
>so i get two L shaped pieces of copper
Why L-shaped??

[Anonymous No.1769033]

>>1768992
a wiggly thing in the air pushes along your antenna a certain way back and forth, if the antenna is just right in length/physical shape this wave creates a tiny voltage which you can measure. imagine a stick in the water that rocks back and forth, and it rocks back and forth the best when it matches the wave. the stick/antenna is in tune with the wave.

[Anonymous No.1769053]

How I'd the uv5r beofeng for a beginner radio/ham ?

[MrCrummy No.1769055]

>>1769053
It's great, I have three of them and they are easy to program and cheap and powerful.
They're the best and worst thing to ever happen to radio as a hobby depending on who you ask

[Anonymous No.1769058]

>>1769053
theyre amazing

[Anonymous No.1769068]

>>1768992
Radio waves are electromagnetic. They generate a very weak current in the antenna which is then filtered, amplified, and demodulated by the receiver. Think of the antenna like a transmission line. Yes, any old piece of wire will pick up something. But having one tuned to the frequency of interest by either using the correct length or a matching network will pick up more of the desired signal.

[Anonymous No.1769075]

So, I read an article on Hack-a-day about this Flex 6500 SDR being a fuckin Windows PC with a fuckin add-on card, and a fuckin "radio" front panel.
AFAIK Flex only guarantees maintenance to 5000 and up models (so if you've got a fuckin 3000 and a wiggly behavior then you're fucked; BTW the 3000 was not a Windows PC).
But if you buy a 2nd hand 5000 today you're basically buying a massively outdated Windows PC that in a very few years will be "obsoleted".

So, cheers to the Trondhejm students who hacked the Windows part. But I'm literally scared to buy anything more recent than a fuckin' 751 (and the 751 still sports its own idiosincracies like the battery-powered firmware) because it becomes literal electronic waste as soon as the manufacturer decides it does not get enough money on maintaining it. And you know, software becomes obsolete way faster than hardware.
Long gone are the times when men were men and a "commercial radio" equipment was a working platform and that could be repaired/repurposed/reengineered by properly following a couple schematics, not counting for their insane long life (my CT1600 still roars like a lion, I only had to switch to new batteries).

[Anonymous No.1769080]

>>1769075
It wasn't the 6500. It was the Maestro control console.

[Anonymous No.1769085]

>>1768930
No. Buy a scanner.

[Anonymous No.1769086]

>>1769075

[Anonymous No.1769154]

[Anonymous No.1769163]

I left the ionospherians behind.

[Anonymous No.1769183]

>>1769053
Get the NA-771(2$) to boost your range significantly

[Anonymous No.1769273]

>>1769154
Insane price.
Is it really that much better than, say, Elecraft?

[Anonymous No.1769339]

>>1769273
Yes.
hes just salty hes a poorfag

[Anonymous No.1769545]

>>1769154
imagine being a hamcuck without building your own equipment from scratch
why even bother then? you are just a money pressing buttons, you aren't a chad operator, you are just a virgin user

[Anonymous No.1769547]

>>1769545
shut up idiot i can spend $3800 and blow your signal out of the water like nothing. your signal is constantly walked over like a little boy

[Anonymous No.1769568]

the quality of these threads has gone to hell and didn't come back.
no wonder amateur radio is dead lol

[Anonymous No.1769594]

>>1769568
>amateur radio is dead
I don't think so. A waterhole for mental minors doesn't represent ham radio.
Image: Amsat connection this morning, long report of a travelling ham.

[Anonymous No.1769600]

>>1769568
corona starting to hit eu and us, soon hams will be the only way to communicate wireless
soon we will be GODS
so fuck off pleb

[Anonymous No.1769649]

Which software should I use to "decrypt" signals like cw, afsk and the like?

Also, Is there a good Audio Modem for Android?

[Anonymous No.1769668]

>>1769649
I use Fldigi both on a Windows machine and a Raspberry Pi. It’s a good all-around software to send and receive PSK31, RTTY, Olivia, etc. It also can kinda sorta decode CW and you can also use it to decode NOAA weatherfaxes.

[Anonymous No.1769795]

>>1769649
>>1769668
i second fldigi

[Anonymous No.1769810]

>>1769649
as for your second question i use andflmsg

[Anonymous No.1769829]

>>1769594
what am i looking at here?
satellite work would be fun if i had a azimuth and elevation rotor. they seem to be very expensive too.

[Anonymous No.1769847]

>>1769829
https://www.jpole-antenna.com/2017/02/07/build-it-2-meter-tape-measure-yagi-beam-antenna/

You can build a yagi. You can figure out the pointing angles before hand and manually point the antenna at the right az/el. You'll even learn about rolling the polarity.

[Anonymous No.1769852]

>>1769847
>https://www.jpole-antenna.com/2017/02/07/build-it-2-meter-tape-measure-yagi-beam-antenna/
ive built them before for 440. i also have a 5el and a 9el yagis ive built for 2m.
antennas are easy to build. the rotor, not so much. im just not there with electronics yet.

[Anonymous No.1769891]

>>1769829
>what am i looking at here?
That's his current locator in Namibia (southern Africa). The Eshail2 GEO satellite carries a transponder with uplink on 13cm (2.4GHz,'WiFi') and downlink in the 3cm (10GHz) band. There's indeed some progress in ham radio:
This may look like the 20 m band but it isn't: from Iceland to Antarctica, from Brazil to China, all within line of sight 24/7 and full duplex ssb (plus other modes).

[Anonymous No.1770142]

how is the beofeng uv5r not sure if im getting serious answers about it or not here...

[Anonymous No.1770143]

>>1770142
it's good

[Anonymous No.1770144]

>>1770142
I have 3 of them, they are useful to use as powerful PMR. There are certain people I will not talk to over a VHF/UHF relay with the baofengs because they'll insult me but you get what you pay for, almost disposable handled HAM VHF/UHF, PMR and whatever frequency you decide to use.

[Anonymous No.1770173]

>>1770142
Best bang for your buck if you want to learn and get started in the hobby.
Buy one, learn PL tones, learn Chirp, listen to your local hams, and stick it in your glove box when you've outgrown it on the possibility you're stranded without a phone or cell service and need someone to make a call for you.
Pretty decent use of a $20 bill if you ask me. Anyone who busts your balls is just angry they spent $200 for the same thing.

[Anonymous No.1770177]

>>1770173
>Anyone who busts your balls is just angry they spent $200 for the same thing.
>the same thing

ohhh yous trollin

[Anonymous No.1770181]

>Be me
>Build "moxon" antenna because i see it being talked about on here and seems people have made them
>Seems easy
>Mine seems to be directed the exact opposite way it was intended
About to take it down and re-re-re check measurements, dont have a clue what i could have done wrong.
Does seem to work better than my dipole.

Its only at 10-15 ft, for testing, could that be the problem?

[Anonymous No.1770182]

>>1770144
>certain people I will not talk to
don't ask
don't tell

[Anonymous No.1770186]

>>1770177
Checked, but not entirely.
VHF/UHF is VHF/UHF despite how complicated you want to pretend it is. The end result of a $300 radio and $20 are the same.
>Muh screen, digital modes, obscure feature you don't understand and I'll never use
Baufags are cheap pieces of shit, but the ham community should embrace them akin to raspberry pis. Instead, we treat them and their users like the plague, which is why there isn't any local traffic.
VHF is the cheapest it's ever been and now nobody uses it.

[Anonymous No.1770187]

>>1770173
This. Why pay $200 for a glorified walkie talkie when you can buy a decent mobile for that much? I’m content with the Baofeng for handheld use.

[Anonymous No.1770188]

>>1770186
oh, i have a bunch. i give them away to new hams in the club if they dont have one yet. but they really are shit. i get that theyre only 20$, and its a great first radio. but they just break for no reason.
for digital i bought an HD1, i guess thats a cheap one too, but i like it. its held up well so far. its my main go to handheld

[Anonymous No.1770190]

>>1770181
the spacing of the elements seems to be the most critical part of that antenna, i would start there

[Anonymous No.1770193]

>>1770188
I'm not to the point where I can picture spending 10X a Baufag on essentially a Baufag in the hopes it doesn't crap out on me. My UV-82 has been rock solid for a year now. I picked up a TYT at a hamfest for $20.
I'm covered for what I use them for, occasional chat and monitoring. If I drop it or spill water or whatever, I'll grab another.

[Anonymous No.1770196]

Anon here that has been asking about the uv5r. I got my beofeng uv5r now and cruising a fairly large city in scan mode and am not picking up shit but static.

[Anonymous No.1770199]

>>1770193
yeah, i get that. i mainly bring them fishing, no cell service where i go. so i really wanted something waterproof. its good for digital on both bands as well.
but i wouldnt spend anymore than i did on a handheld. i just dont use it that much, but its nice to know its there in an emergency.
>>1770196
>fairly large city
...theyre probably using digital.
did we check radio reference or are we just blindly searching for something?
scanning speed on them is slooooooow

[Anonymous No.1770201]

>>1770196
You need to listen to the repeater frequencies, and even then, it may be an hour before you hear anything.
Hence my rant here >>1770186. If the community treated these like a great, cheap tool as opposed to giving people shit, there might actually be traffic.

[Anonymous No.1770204]

>>1770201
repeater time

[Anonymous No.1770225]

>>1770196
you need an external antenna, you'll get shit rom the inside of your car.

[Anonymous No.1770249]

>>1770225
Just stepped out of the vehicle and finally got NOAA for a second, lol. This thing is piece of shit

[Anonymous No.1770280]

>>1770249
your car is a Faraday cage. No radio will work properly.

[Anonymous No.1770325]

>>1770280
my phone does

[Anonymous No.1770327]

>>1770325
different frequencies, different coverage.
a 4G phone will get enough signal inside a steel biscuit box.

[Anonymous No.1770357]

>>1770327
It's a 2G 900MHz GSM phone, a two-way radio. It works properly.

[Anonymous No.1770358]

>>1770357
144 MHz, 900MHz, see the difference ?

[Anonymous No.1770359]

>>1770358
i doubt he does. hes either stupid or trolling.
or both

[Anonymous No.1770365]

>>1770358
My 3W VHF radio works too. Cars have windows you know.

[Anonymous No.1770366]

>>1770365
Well, get a good antenna for your baofeng.

[Anonymous No.1770429]

>>1770199
>or are we just blindly searching for something?

Yup we are blindly searching and should easily be able to pick up something..but nope any convos it stops on all static every time. Things a piece of shit

[Anonymous No.1770432]

Guys, I just found the first useful purpose for ham radio!
You can repurpose the power supply for electrolysis.

[Anonymous No.1770534]

>>1768484
But there won't be any more rules or licenses after the collapse. You can have shit-transmitters broadcasting their farts at 1kW and there won't be any authority to report them to. You can triangulate them but all that will get you is an arrow in the face. How will hams cope?

[Anonymous No.1770536]

>>1768512
Coronachan prefers boomers so there will be lots of ham equipment there for the taking.

[Anonymous No.1770544]

>>1770173
this anon speaks truth
>>1770186
this anon speaks truth without offending old farts

you all prepare for the coming boomer death, quality of life will decrease.

[Anonymous No.1770561]

I love putting out 1000 watts on MURS and disrupt every Walmart store's radios within a 20 mile radius.

[Anonymous No.1770574]

How hard is to triangulate a signal that transmits once per day for say 10 ms?
I want to use 2 watt lora transmissions to get more distance but anything over 0.1W is illegall here, so i wonder how hard would this be to track down in a medium sized city for the FCC clowns

[Anonymous No.1770575]

>>1770574
I got a P25 radio that transmit data bursts every 2 minutes exactly. 5 bursts that are 2 and a half seconds long in duration and some ham boomer is trying to track me down. If he steps on my property I will open fire on him in self defense.

[Anonymous No.1770604]

>>1770575
watch out for that edge, fucking faggot

[Anonymous No.1770605]

>>1770604
(You)

[Anonymous No.1770615]

What DMR hot spot should I get on Amazon that will let me connect my Motorola XPR 6550 to it and allow me to talk to other Talk Groups worldwide?

[Anonymous No.1770677]

>>1770575
Any transmission over 10 ms will be found. Multi lateration is more plausible than triangulation by DF.

If you mess up military bands by, say, harmonics, they will now deal with your attitude with a preemptive strike.

[Anonymous No.1770681]

Any recommendations for cheap HF transceivers, /ham/? I do not care about having a waterfall, as I already have an SDR setup that does reception for me. Just need something that can transmit.

[Anonymous No.1770694]

>>1770681
Pixie is cheap and cheerful but needs extra filtering. At 3 dollars it sure is cheap.

[Anonymous No.1770696]

>>1770681
You're too vague, buddie.

[Anonymous No.1770698]

>>1770681
Depends on what you consider cheap. You can pick up a used radio for a few hundred bucks. There are new radios that can be had in the $500-$800 range. I have a Yaesu FT-450D that I bought new for around $700.

[Anonymous No.1770709]

DOES UV5R BEOFAG REALLY WORK FUNCTIONALLY OR NOT ????
MY DOES FUCKING NOTHING BUT STATIC!!
REAL ANSWER PLEASE !

[Anonymous No.1770714]

>>1770709
Jesus H. Christ calm the fuck down.

[Anonymous No.1770715]

>>1770714
Maybe the directions were unclear and he's having discomfort with an antenna sticking out his bunghole?

[Anonymous No.1770720]

>>1770696
>>1770698
Sorry, should have been more specific. I am looking for something below $1000 or so, capable of all HF bands, and preferable capable of doing digital modes.

I have been considering a Kenwood TS-480, I can get one for about $600 used. Does anyone have experience with it one way or another?

[Anonymous No.1770724]

>>1770715
No shit. How retarded do you have to be to not know how to punch in NOAA weather radio or something just to see if it’s receiving?

>>1770720
The Yaesu I mentioned will suit your needs but I’m sure the Kenwood would be fine too.

[Anonymous No.1770729]

>>1770720
I'm the anon that started with a $200 Yaesu FT-101 and with 2 audio jacks (and lots of help here), WAS with FT8.
Then I got a new IC-7300 for $900 and was I did that sooner.
I almost went for the IC-718 or a budget Yaesu, but someone pointed out the need for additional connection hardware if you want to do digital. Plus the built in tuner is awesome.
If you're patient, you may start seeing the used IC-7300s in the $700 range.

[Anonymous No.1770731]

>>1770729
Why is the price falling?

[Anonymous No.1770732]

>>1770720
KX2 is $800 and has all hf brands except 160 m

[Anonymous No.1770733]

>>1770729
Honestly, the biggest challenge for me doing digital is finding the 6 pin connectors in order to solder up my own cabling. Making the interface ain’t too difficult otherwise. Especially if using VOX.

[Anonymous No.1770735]

>>1770731
They're a few years old. Found one on QTH for $720 shipped.
Given most of the other transceivers that are 10-20 years old still go around $400, that's a nice, cheap upgrade

[Anonymous No.1770736]

>>1770735
* looks like he's in Columbia, but give it time and I bet the same price will show up in the US as well.

[Anonymous No.1770737]

>>1770720
the 7300 is a great rig for the price.
would suggest

[Anonymous No.1770750]

>>1770737
How does it compare to KX2?

[Anonymous No.1770754]

>>1770750
>KX2
it does 12W. its more of a backpack radio. you would want an amp. i dont really know much about it to be honest.

[Anonymous No.1770908]

So what’s so great about JS8Call? I tried it out a bit ago and it’s super fucking slow.

[Anonymous No.1770925]

An amateur radio regardless of wattage can communicate with another amateur radio so long as the antennas are in line of sight correct?

[Anonymous No.1770937]

>>1770925
Generally speaking, yes.

[Anonymous No.1770976]

3000 watt spark gap? Can you hear me now?

[Anonymous No.1771059]

Seems most HF rigs use on set of toroids for each band. Why use separate toroids rather than toroids tapped at several turns?

[Anonymous No.1771061]

>>1771059
Switching would be too complicated because the capacitors also change and different bands may require different core materials.

[Anonymous No.1771076]

>>1771061
Many band are close such as 10, 12 and 15 m. Do you really need 3 different materials?
Also, why is switching harder when you already use relays for switching?
It would appear reusing a toroid with several tappings would save some cost but importantly also PCB area and weight.

And last but not least, do you have to change the capacitors? If we take the progression 10, 20, 40, 80, and 160 m we see a fixed doubling, of wavelength, or half the frequency, which means a 4x change in inductor alone to accommodate the change in resonant frequency.

[Anonymous No.1771098]

is the problem with uv5r not picking up any signals in scan mode because it scans slow af
and it only has 6 digits it scans for, example.. 462.562 instead of 462.56250

[Anonymous No.1771104]

>>1771098
>it only has 6 digits it scans for, example.. 462.562 instead of 462.56250
It does append the last two digits, it just doesn't display them but yes, the problem is that it scans slow.

[Anonymous No.1771105]

>>1771076
Just do it.

[MrCrummy No.1771126]

>>1771098
if you change the step mode in the settings it will scan more digits, but that will slow down your scan speed, retard.

[Anonymous No.1771172]

>>1771098
Did you set the squeltch level ?

[Anonymous No.1771177]

>>1770173

[Anonymous No.1771179]

>>1771177
Available never ever.

[Anonymous No.1771192]

>>1770561
Just how many Walmarts do you have within 20 miles of you?

[Anonymous No.1771203]

>>1771177
Don’t see the purpose of buying a QRP rig that costs as much or more than a good 100 watt mobile.

[Anonymous No.1771258]

>>1771179
Why not?

[Anonymous No.1771264]

>>1770575
Sorry to inform you, Sir, but RF spectrum is not your property.

>>1770709
Sorry to inform you, Sir, but you could use $20 and buy another one to test both.

>>1771203
Sorry to inform you, Sir, but investing in good antennas is better than investing in more watts.

[Anonymous No.1771279]

>>1771264
Even better to run 100 watts into a good antenna. And you can buy a mobile rig with more features than this piece of shit for less.

Life is too short to be a QRP faggot.

[Anonymous No.1771312]

What the fuck is this place? You collect some sort of radios and doing what with them?

[Anonymous No.1771445]

>>1771126
@ mr Crummy
You are rude retard faggot

Please respond retard

[Anonymous No.1771455]

>>1768578
Are you that furfag who spinned his volvo

[Anonymous No.1771482]

>>1771192
7. Four Supercenters and three "Marketplace Walmarts"... they all use MURS. I typo'd, I meant to say I'm putting out 2000 watts.

[Anonymous No.1771582]

Have conditions over the past 2 days been in the dumps for you guys, or do I need to go check all my connections?

[Anonymous No.1771677]

>>1771279
Is your life short enough to be a radio pest?

[Anonymous No.1771707]

>>1771677
I don’t know, you tell me. Is it?

[Anonymous No.1771727]

>>1771582
>you're not alone. dead as hell in 7 land(US)

[Anonymous No.1771750]

>>1771582
20 and 40 have been excellent in the day for me, 40 and 80 have been awful in the night though.

[Anonymous No.1771810]

>>1771482
>I jam MURS with 2kW for the lulz
>Mommy encourages my pretend time for good boy points.
Cool, bro. If you did it for reals, there's no question they'd be looking for you, due to the fact you'd be splattering across PS bands.

[Anonymous No.1771823]

Whats one of the more practical, high bitrate data modes for HF doable with a 'cheap' setup like a ubitx

[Anonymous No.1771826]

>>1768446
My 40 m // /// ./. ... . eBay Chinkshit radio is trash for $20. I’d rather have a 3-30 MHz handheld battery-operated multiband. But does that exist? Furthermore, if a receiver could switch channels with a knob, why can’t a receiver? Must it be doomed to only a handful of frequencies? Don’t think that mains powered radio will be up after Corona/ WW3/ Second Coming/ Boogaloo. Solar will sort out anything under 120 W for me.

[Anonymous No.1771827]

>>1771826
*Why can’t a transmitter?
I’m going to shit on Steve Nob’s grave

[Anonymous No.1771831]

Whats that big constant piece of shit in the middle of 40m

[Anonymous No.1771833]

>>1771826
>>1771827
nah man HF (3-30mhz) transceivers are perfectly capable of seamlessly changing frequencys. Not sure where you are getting that info from

[>>1771833 No.1771834]

>>1771826
Oh and also, transmitters have peak efficiencys at certain frequencys, depending on antenna and other things. Receiving is basically just an antenna and a filter so its much easier than transmitting.

[Anonymous No.1771843]

>>1771833
Take a quick peak at eBay
They all stick to one band almost exclusively
20, 40, 80, etc.

[Anonymous No.1771858]

>>1771831
A place to practice CW. Or multipsk for maximum comms. :)

[Anonymous No.1771864]

>>1771843
Are you just talking about cheap Chinkshit CW kits? Because even the poo-in-loo uBITX is multiband. You can also get a Chink 6 band kit for about $100 if you've got hot air or a reflow oven to deal with tiny SMD packages.

[Anonymous No.1771865]

>>1771843
Well there is the hackrf, albeit pretty low powered it doesnt give a fuck about tuning at all. Pretty sure there must be a more modern 'variant' of it out there though

[Anonymous No.1771866]

>>1771865
>Pretty sure there must be a more modern 'variant' of it out there though
ADALM-PLUTO or a LimeSDR.

[Anonymous No.1771889]

>>1771823
my best guess is psk 1000r.

[Anonymous No.1771914]

>>1771834
Obviously
>>1771864
I’m referring to the fact that most transceivers on the market have only one or a few bands while receivers have dials that can scan the whole frequency range (3-30 MHz, 0.52-3 MHz, 88-108 MHz, etc.).
>>1771865
It or its clones seem excellent if a bit pricey. I think this is the best bet if under 200 AUD; preferably under 100.
SDR with a solar powered laptop (USB or other connection) would beat out the Baofags with certainty provided (a) good adjustable antenna(e).

[Anonymous No.1771935]

>>1771810
>PS bands
Everyone around me uses P25 Phase II Encrypted systems, are you from like a podunk town that still uses VHF police bands? LOL what a tard. I am as realistic as can be. You can find my videos on YouTube if you look hard enough.

[Anonymous No.1772002]

Uv5r will receive transmission ...but I can not send transmission??? Please halp

[Anonymous No.1772019]

Testing..testing...I don't like niggers does any one copy ?

[Anonymous No.1772021]

>>1772002
Have you set your PL tone and how far are you from the repeater?

[Anonymous No.1772025]

I found a few PCs in the trash and have been scrapping them. The power supplies have a nice collection of torroids, just an fyi.

[Anonymous No.1772037]

>>1771914
Why would you want to transmit on a commercial or even military band though?

[Anonymous No.1772108]

>>1771582
Pretty shitty where I am in Northeast USA.

[Anonymous No.1772171]

>>1772037
I was doubly referring to how receivers have entire ranges of channels while transmitters (ham) usually only have one to a few ‘bands’.
Also: wouldn’t it be nice to transmit on commercial channels? 3-30 MHz is shortwave so it’s a non issue there, but on AM and FM, if you find an unoccupied frequency for practicality’s sake (to avoid signal conflicts) , you wouldn’t need to buy two transceivers; your recipient only needs a cheap ‘regular’ radio.

[Anonymous No.1772193]

my
.
my
.
my

[Anonymous No.1772197]

>>1772171
nah man, thats stupid. There is PLENTY of space on the HF (<30mhz) bands + nobody else will be able to talk to you there. Its pointless

And no, there is no way youll reliably broadcast any meaningful distance on 500khz - 1mhz.

Just get a seperate FM transmitter (sensible would be to learn the subject and build one yourself but the chinese have you covered too), that idea is something cool and I would want to setup my own radio tower (even now).

[Anonymous No.1772220]

Is a new BaoJie BJ-218 for 30$ good? Is it actually 25W?

[>>1772197 No.1772223]

>>1772171
Hey sorry for my choice of words. Just check out http://hackgreensdr.org:8901/ , click "all bands" and see for yourself how much space there is

[Anonymous No.1772344]

>>1771831
OTH radar

[Anonymous No.1772345]

What the fuck are they doing in the allocated amateur radio bands. Someone should generate a false rocket signature

[Anonymous No.1772431]

>>1772197
I think my ambiguity may have confused you. I don’t mean that there’s only a few bands on the shortwave spectrum (obviously), but most shortwave transceivers (the hardware) have either one or a few bands and a lot are only in // /// ./. ... . which is well and good for me (my only shortwave is a CW shitty Rockmite 51 40 mette band), but not for the participation numbers.
Yeah, it would take a substation to power an AM station with range, but I’ve still seen a few small transmitters, especially from the States.
A lot of two-ways receive FM, so you could even make a mini numbers station if you will. Send a code, get your point man to gather the intel, then collect it in encrypted form.
>>1772223
What? You thought I was offended?
That’s laughable!
That’s a bad link or it’s been taken down (maybe at least in Aus). Send some screenshots or something rather.

[Anonymous No.1772433]

>>1772431
*AM receivers sold from the States on eBay

[Anonymous No.1772440]

>>1768446
mind if I FART in your radio

[Anonymous No.1772465]

>>1772431
Here's your screenshit.
The link is correct but it isn't worth it.

[Anonymous No.1772470]

>>1772465
Not far away but much better: Some CW, the usual congregation of whining bots trading their synthetic data and a lot of priyom from real people.

[Anonymous No.1772517]

>2800mAh
>Waterproof
>Doesnt require charging station
>same 22$ price tag as uv5r
>otherwise exactly like the uv5r

Is this the new uv-5r?

[Anonymous No.1772518]

>>1772517
>Waterproof
No.

[Anonymous No.1772528]

>>1772517
Is it supported by CHIRP and can I use the same programming cable? Because if so, I just might have to get one.

[Anonymous No.1772621]

Non-compliant equipment BAOFENG UV-860
OFCOM has pronounced a ban on the sale of this equipment on 16.10.2019
Image shows how cheaply made it looks.

[Anonymous No.1772622]

>>1772621
>land of freedom
kek

[Anonymous No.1772636]

>>1772465
Fair enough
>>1772470
>licensed
We pirates rule the Waves

[Anonymous No.1772680]

>>1772621
>>1772517
>no SSTV
>no APRS
>no QRP modes
>no CW decoder
>no digital modes
>no morse key plug
>no decent antenna

[Anonymous No.1772699]

>>1772622

[Anonymous No.1773109]

>>1772699
selfie

[Anonymous No.1773155]

Anyone here mess with SDR? I was thinking of buying one of those usb RTL-SDR kits with an antenna and some wires. Are they too dogshit to be worth the money, any software recs, etc?

[Anonymous No.1773184]

>>1773155
For $20 they do alright. Don’t expect to pick up much of any shortwave traffic on the antenna that comes with it though.

[Anonymous No.1773268]

>>1773155
Dont get a fancy one. Just get the year old r820t
Should cost you about 14$. Diy the antenna. This is nessecary. The stock antenna wont pick up anything but your commercial radio station.

[Anonymous No.1773272]

>>1773155
>Anyone here mess with SDR?
Nope, never. You'd be the first person to ever talk about this on this fine forum.

[Anonymous No.1773273]

>>1773184
Thanks, I ended up picking it up, arrives tomorrow so we'll see how it works out.
>>1773268
damn already bought the kit with the antenna like an hour ago, oh well. Not like I can't build one later though. Judging from the sentiment without a useful antenna I'll run out of shit to do real quick so I guess thats another project to add to the list.

[Anonymous No.1773285]

>>1768662
I hope not lol. I used to just borrow someones callsign.

[Anonymous No.1773295]

>>1773155
Honestly, they are a great bang for your buck. One of the RTL-SDR starter kits are a great way to get started with radio. Just screwing around with a waterfall to play with can teach you a lot more than you would think.

If you want to put more money into it, for your first SDR I would invest in a proper Discone antenna before a more expensive SDR unit. You can get a cheap Discone antenna on Amazon for about forty five dollars, and the required adapters and cables for it for another twenty or so. This will increase the amount of signals you can pick up practically tenfold.

You are going to want a PL-259 to SMA adapter, and enough cable to run from an outdoor location to the computer the SDR is going to be on. Running an SMA cable through a window is possible, but running PL-259 is not (It is too thick).

If one of those Discone antennas is too big for your setup, the starter antenna that comes with the RTL-SDR is cheap-feeling, but acceptable. Try to get it at least mounted outside of a window if possible.

[Anonymous No.1773311]

>>1773295
>starter antenna . . . is . . . acceptable
A coat hanger is a better antenna than that piece of shit.
>Running an SMA cable through a window is possible, but running PL-259 is not (It is too thick).
We got a real pro here.

[Anonymous No.1773321]

>>1768484
Nobody callled me a fag.
If you want to restore networking/internet after the collapse you want to look in to high speed mesh networking. BATMAN, and other projects like it. There is some exciting work being done in texas!

>>1768517
You are going to want to search for russian amateur radio hacker sites. looking for .ru's will be your best bet. Back when I had to program radios for work, if I was missing something, I would take the russian hacked programs.
>>1768518
This is a /ham/ thread. Please keep the tone friendly.
>>1768638
The NSA, Military and FCC do. But if you transmit from some forest nearby....
>>1768676
Depends on location in the world, depends on power, and depends on frequency within a range.
>>1768930
While the other anon may have been a bit snarky with suggesting you buy a scanner, it may be your best bet.
You will want to find out what local traffic _you_ want to listen too. Tow trucks, waaaaambulance, etc. Prepers will probably be on the national simplex VHF and/or UHF calling frequency.
I know the answer you want to hear... Can't give it to you. If you want those frequencies, it'll be best for you if you find them yourself.
>>1769053
For the price, it's a great way to learn!
Too each their own!
I wish you all the best of luck!
>>1769163
Did you go to sat comms? LOS?
>>1769545
Haha, not the person you are replying too,
I'm not a great "homebrewer". I mostly follow schematics other people have made. I have more fun learning when something goes wrong.
I highly recommend the book "Crystal sets to sideband", it's free, and takes you from user to builder!
and on that note:

>>1769547
With the simpler equipment, spending a hundred bucks, I can use CW and work through your 1kw ssb trucker noise (not that I want too, or have too).
There are a few bad operators out there with lots of juice. But thank goodness the majority of people can remain gentleman/ gentlewoman and enjoy the airwaves together!

[Anonymous No.1773322]

>>1769594
So true!, Have you received any other sats?
>>1769649
>>1769795
Fldigi! :)
>>1770142
Friend, at some point you have to decide things for yourself. Make mistakes and have fun.
At the price point, it is an easy way to dip your toes in.
>>1770432
Haha, when I was younger I used my power supply to generate hydrogen. I had no balloons. I had some free condoms from the health clinic (I wasn't using them anyways). So, I made hydrogen condom balloons. I made over 10 of them, the idea being that I was going to lift my antenna. It didn't work (The wire was too heavy/ thick).
A lifting kite would probably work better.
>>1770574
Take a look at the FCC website and see if any enforcement action has been taken against anybody in that frequency range. They are usually complaint driven. Unless you happen to be part of a church, in which case they hunt you down and crucify you with fines.
>>1771105
Nice!
>>1771312
Communications. Sometimes we talk with each other, sometimes we talk with anons, and sometimes we talk with robots....
It's like posting on here, except you might learn a little about..
Do It Yourself Communications :D
>>1772171
To have a cheap and power efficient amplifier, it needs to be class C, D, or E. Which requires filtering. Which requires a tuned filter. So, no matter what, if you want to stay cheap (and legal), you are going to get stuck on _a_ band.
>>1772622
I suffer from double think...
I support the citizens right to do what ever they want on the airwaves.
I support the governments regulation.
If everyone did what ever they wanted, commercial interests could easily take over and BTFO everyone. Even the pirates wouldn't have room!
If you have shoddy TX, it is possible (and likely) that you will have harmonic tx on other frequencies. Doing so can interfere with ambulance, police, fire, emergency communications links that you can't even hear because you are tuned to another freq!
Just food for thought friend.

[Anonymous No.1773365]

Lads, since analogue TV is out of biz, let’s pirate it and make broadcasting stations.
>>1773322
I’m indifferent to legality. I just want one that works. Funny that you tried hydrogen condoms. I made my rockmite 51 40 metre PoC (piece of cunt) as a high school electronics major project. In the brief, I had the ambitious and grandiose idea that I’d use shitty supermarket helium balloons to suspend the antena (4 attached to all four corner of light wooden plank). Sadly, my year was filled with bludging so I never got to that stage and instead bought a shitty SMA antenna to transmit and used long wire around a tree to receive. It would have been interesting to try out; the plan was to use a fishing reel to hold the cable 10 metres up or more.

[Anonymous No.1773437]

>>1773155
The dongle is good, but the antenna is useless.
Get the dongle and a handful of misc SMA to UHF antenna connectors and build your own antennas from scrap wire depending on what you want to hear.
It's a cool, cheap science experiment. Wish they did that with us in school instead of talking about climate change and other bullshit.

[Anonymous No.1773453]

>>1773322
>wire was too heavy
A third hollow cone is at the bottom to couple the 50Ω source to the Goubau line, a very thin copper wire. The antenna is a 'wide band' dipole, good enough for WiFi et al. Very effective.

[Anonymous No.1773519]

>>1772680
also

no SSB
no 6m band
no SSB
no 1.25m band
no SSB
no fuckin SSB modes, what the fuckin fuck

[Anonymous No.1773696]

>>1773365
>Lads, since analogue TV is out of biz, let’s pirate it and make broadcasting stations.

Huh? It's not. Where are you from?

[Anonymous No.1773715]

>>1773696
probably Europe.
fun fact, analog tv channels were 8 MHz spaced and 6.5 MHz wide, while DTB is 8 MHz wide and uses those very same channels - except a few who were assigned to cellphones and shit.

Tell those pirates that there's plenty of megahertz free at the "many gigahertz" range. You want a 2GHz-wide channel? no hamradio enthusiast is using it at 248-250GHz frequencies. Why should you pirate a few kilohertz channel at low miserable frequencies?
Imagine building a Moxon antenna for the 249 GHz range.

[Anonymous No.1773849]

>>1773696
Aus
>>1773715
There was a time when analogue existed as digital’s contemporary before it had been phased out. They didn’t share frequencies; even today, you see analogue channel searching when you ‘scan for channels’ in the TV menu.
>250 GHz
Fuck, if I wanted to be irradiated, I’d go straight to Chernobyl. You’d need virtual kissing distance to receive a signal at that band too.

[Anonymous No.1773856]

>>1773849
>kissing distance
Or just line of sight. Yes you can go a hundred kilometer on 250ghz with low wattage.
If there is no rain or leafes on the loose.

[Anonymous No.1773928]

The internets is packed with antenna science but I really miss a practical guide.
It should be like this:
- currently installed antenna?
- available space for new antenna mounts?
- wind/weather issues?
- neighbor/social issues? (thugs,
- how much time/money are you willing to invest to get results?

That definitely shrinks the number of options before any bands/modes/irradiated power considerations.

Also, that practical guide should be named "every dime you spend for a radio, a dollar shall be spent for the antenna". I always laugh at those guys wasting thousands bucks on a radio and then realizing either they don't have enough physical space for the antenna or trying to buy a cheap one. Or, worse, losing to 60mph winds the "80mph winds" rated antenna. Or, even worse, some thug - possibly a neighbor - going on the roof and vandalizing it just because.

[Anonymous No.1774084]

>>1773715
>249 GHz range
Any humidity in the air will absorb RF energy in this band, strongly.
https://www.rfcafe.com/references/electrical/atm-absorption.htm

[Anonymous No.1774098]

Wow, digital decoding software fucking sucks ass. I just want to read afsk or heck, even simple morse code will do but all the programms are either extremly error prone and can only do one very specific codec, are riddled with viruses, are impractical garbage (f.e. requires you to record every transmission you wanna decode and have to select a shitload of parameters even though its one of the most common formats)
It all sucks

I just want to check with the rtl-sdr if my afsk arps transmissions works ffs. Cant be that hard
>Is there ANY useable multi codec digital decoding software for windows or linux out there? On the fly decoding only. No bs

[Anonymous No.1774102]

SDR sharp experiences this problem. Occurs on two different dongles https://streamable.com/ey36h what is it

[Anonymous No.1774117]

Rate my setup

[Anonymous No.1774198]

>>1774117
>t.

[Anonymous No.1774215]

>>1773715
The distance record for 250GHz is something like fifty miles if I remember correctly. That is under ideal conditions with perfect equipment on both sides. Realistically, you are probably going to give yourself at best a ten-mile range. And cancer.
>>1774117
>Not in a submarine environment listening to 2200m band
Why do you reject scientific underwater hamster objectivism, anon?

[Anonymous No.1774226]

>>1774215
>tfw you choose Hampture

fuck vanilla hobbies, im putting my hamsters in a fucking submarine!

[Anonymous No.1774246]

>>1774117
Falso y gay

[Anonymous No.1774359]

Fucking ethernet 100 mbps is ruining the HF at home, at least now I know where it comes from.

[Anonymous No.1774361]

>>1774359
Time to get some shielded cable.

[Anonymous No.1774392]

>>1774117
noice. a Japanese-made radio for SWL listening.
I also find not much interest in broadcasting out my own voice. I'd love to do some digital shit like rtty and sstv

>>1774359
not counting neighbor's fuckin powerline

[Anonymous No.1774393]

Accidentally got a 1000 watts FM broadcast transmitter (88-108 MHz because European regulations).
I heard about someone in my country converting a thing like that to do 144 MHz, but I'm definitely unable to reach him out.

[Anonymous No.1774410]

>>1774098
Fldigi.

[Anonymous No.1774415]

>>1774410
Fldigi doesn't do AFSK modes (packet, aprs, etc) because they are basically non-existent on HF bands

[Anonymous No.1774416]

>>1774098
>>Is there ANY useable multi codec digital decoding software for windows or linux out there? On the fly decoding only. No bs

apt-get install direwolf

Command-line only. Converts audio input to readable KISS frames; defaults to 1200, supports 9600 as well.
I'm currently using it to decode incoming APRS packets (audio output from my radio to mic input of my Ubuntu box).

[Anonymous No.1774448]

>>1774416
>Command-line only.

[Anonymous No.1774496]

do you run rtl-sdr 24/7 to find nearby radio operators? today i remembered that i do have one of those usb sticks leftover somewhere in storage, and extra antennas to build a little listening station.

[Anonymous No.1774502]

>>1774496
Yeah, I run rtl_power across 2m and 70cm to see when people use the bands locally.

[Anonymous No.1774683]

Russian stations will be active on February 29 (14-22 UTC) at 2400.040 MHz in FT4 and FT8 modes.

[Anonymous No.1774690]

>>1774683
Confirmed. Activity started a few seconds after 14.00z.

[Anonymous No.1774743]

>>1774502
is CB active around you guys?

[Anonymous No.1774746]

>>1774743
french fag here, only for 4x4 meetings and some but few eastern europe truck drivers

[Anonymous No.1774752]

>>1774746
we've got old people in bigger cities shitposting and hanging out in the evening, and truckers of course.
wish we could spread the happy message of cb further

[Anonymous No.1774753]

>>1774752
Where are you ? US ?

[Anonymous No.1774756]

>>1774753
eastern DE

[Anonymous No.1774779]

>>1774690
For some reason they switched to FT4.

[Anonymous No.1774781]

>>1774779
QO-100?

[Anonymous No.1774788]

>>1774781
yup

[Anonymous No.1774888]

>>1774743
Southern USA here. CB is very active. Lots of rednecks like to jaw-jack in the evenings.

[Anonymous No.1774905]

A family member died so I got a ic-746. Is that a pretty decent radio? Any easy way to hook it up to pc for digital modes?

[Anonymous No.1774910]

>>1774905
here is the manual
http://www.radiomanual.info/schemi/ICOM_HF/IC-746_user.pdf

You can do digital modes with a sound card and an interface from aliexpress for the PTT for cheap

[Anonymous No.1774914]

>>1774905
>>1774910
>VHF and HF and 50 MHz
that's really good, 3 antennas, modern transceiver, you are set. Try to get every thing else that goes around, power supply, tuner, cables, you need a shit ton of things

[Anonymous No.1774915]

Oh yeah I have everything else too. Including a bencher iambic paddle.

[Anonymous No.1774916]

>>1774915
>>1774914
Fug, forgot to quote.

[Anonymous No.1775104]

Conditions seem to have been in the dumps for the past day or two, but shouldn't I be better off than this?
I'm receiving Auz, India, and South Africa and even got a QSL from Greece yesterday. I just want Hawaii, lol.

[Anonymous No.1775168]

GUYS!! I just bought a Baufeng offf of Amazon™ along with a shipping container worth of toilet paper because of some beer party. Am I going to be the cool kid for once?

[Anonymous No.1775169]

>>1775168
yes

[Anonymous No.1775257]

>>1771105
Any recommended software and guidelines for filter design? There are many sites that offer designs for various types (Bessel, Elliptical...) but the information on when to chose what is missing.
Also, is that second part a band stop filter?
So if you want to make a filter for 7 MHz, should a 14 MHz filter for harmonics come first or last in a filter chain?

[Anonymous No.1775329]

>>1770575
Based
>>1771264
You can't step on RF spectrum, nigger

[Anonymous No.1775357]

>>1775257
https://rf-tools.com/lc-filter/

[Anonymous No.1775363]

god fucking damnit FUCK FUCK CUNT BAG
I lost my dvb-t stick somewhere, so no instant rtl-sdr for me.

[Anonymous No.1775391]

>>1775363
Settle down Francis. You can get another for 20 bucks with a bunch of shitty antennas you will never use. Half of the people who buy these things never figure out how to change the sample rate to get HF anyway.

[Anonymous No.1775408]

>>1775257
This book has some good sections on LC filters and transister biasing.
Basically, there are tables of L/C values normalized to 1ohm source impedence and 0.1-10 ohm load impedance, then you just scale up to 50ohms or whatever.

[Anonymous No.1775530]

>>1775408
Erm, which book?

[Anonymous No.1775572]

>>1775391
all i want to do is hook it up to my roof's dangly metal bits and monitor cb traffic to find nearby people.

[Anonymous No.1775603]

is there a direct UHF equivalent of the TM-281A?
I want something that's just as bare bones and basic, also kenwood, but UHF instead of VHF.
I already have a TM281 and wanted another preferably identical unit to stack on top of it to handle my UHF band.
I am aware they make dual band radios but adding one more radio for 150 dollars is cheaper than buying a 500 dollar dual band kenwood, plus I can use two antennas instead of a dual band antenna which is just a compromise.

[Anonymous No.1775619]

>>1775603
?

[Anonymous No.1775622]

>>1775619
looking for specifically a kenwood model that's going to match the 281a and also I don't want chink shit that's gonna parasitic drain my battery if i don't start my truck for a week.

[Anonymous No.1775652]

>>1775619
i got a "blueskysea" KT-8900D, and i cant figure out how to program it.
seems to be a bunch of radios that are kinda similar, but arent.
the one i got says its supposed to be quad band, and some are tri band.
would love to be able to program it

[Anonymous No.1775751]

>>1775357
>https://rf-tools.com/lc-filter/
A good example of online filter calulators but it still doesn't answer the important questions on how to make the designs, the when and what.

[Anonymous No.1775850]

>>1775751
Did you recognise the 'when and what' of the posted filter? It is related to the Pixie (pseudo) problem mentioned in the FAQ.

[Anonymous No.1775916]

>>1775530
whoops

[Anonymous No.1776080]

I'm gonna make a dipole tomorrow. I have an unused flag pole and I plan on hoisting it up to the top of the flag pole. I'll have to in an inverted v. Sound like a sound idea?

[Anonymous No.1776092]

>>1776080
That was basically me setup for a few months until I got fed up with the limitations of the takeoff angle of a dipole (too much local traffic) and turned it into a fan vertical.
The pulley component of the flag pole is fantastic though for making adjustments.

[Anonymous No.1776127]

>>1775850
Isn't the Pixie problem real without added filters?

[Anonymous No.1776178]

>>1776127
The Pixie was never meant to be FCC-legal. The real problem is not the (solvable) harmonic content of the output signal but the fact that it also transmits in default (=receive) mode because it is a direct conversion transceiver. Such a simple construct cannot prevent the LO signal from leaking to the antenna where it appears as what the FCC calls a 'spurious emission'.

§ 97.307 Emission standards.
.. the mean power of any spurious emission from a station transmitter .. must be at least 43 dB below the mean power of the fundamental emission.

The unmodified Pixie under test was found to emit about 25dBm at 7.023MHz and about 9dBm at 14.046MHz which is only 16dB below the fundamental. This can be improved with some effort. What cannot be removed is the -7dBm leak of the local oscillator/mixer in receive mode which amounts to -32dBc. The reason is that transmitter and receiver share a common signal path to the antenna.

[Anonymous No.1776212]

How can I test more than one combination of bits? So how to transmit multiple codes, instead of only one code with GNURadio and HackRF?

[Anonymous No.1776260]

>>1775850
I understand the superficial part of "when" that you need a low pass filter for a transmitter. I just don't know when you use a Bessel filer and when you use an elliptic filter. Also ordering is unclear, such as where in the filter chain should a band stop filter be placed.

>>1775916
Thanks. That is 400 pages, will take me a bit of time to digest.

>>1776178
>The Pixie was never meant to be FCC-legal.
I never knew that. My understanding from the sources in the FAQ was that later rules tightened emission limits and thus made it necessary with a better filter. And that is what brought about my interest.
The 14 MHz leak was fixed using a band stop filter in one experiment and got to within legal limits.
The -7 dB leak is worse, will a buffer amplifies fix that?

I had planned to buy a Pixie and upgrade the filters but now I don't know if it is worth the effort.

[Anonymous No.1776312]

How can I learn using GNURadio? I think it seems complex but it's easier than it seems.

[Anonymous No.1776372]

>>1776260
>That is 400 pages
it's only 178 friend

[Anonymous No.1776379]

>>1776372
Phew! Thanks. Not sure how I made that mistake.

[Anonymous No.1776485]

I didn't imagine radios were a hobby and I'm sincerely curious here: what's the point of this hobby? What kind of experience are you guys after?

[Anonymous No.1776490]

>>1776485
it appeals to some people to have a way to talk to communicate with other people around the world with little to no infrastructure supporting them.
or to just chat with others who are interested in electronics.
maybe to contact an astronaut on the iss
lots of other reasons i guess.

[Anonymous No.1776494]

>>1776490
Didn't widespread high-speed mobile internet kill radio?

[Anonymous No.1776501]

>>1776494
probably for 90% of people who might be interested in it otherwise.
i just find it fun, rf waves are passing thru at all times.
nice to pick it up and see whats going on around you.

i also never knew how much crime was going on in my area until started listening to a scanner

[Anonymous No.1776515]

>>1776494
How do you think mobile internet is possible?

[Anonymous No.1776521]

>>1776485
It appeals to the nerd in me.

Like the other guy said, it’s pretty cool to be able to talk to someone without the use of any communication infrastructure like cell towers or telephone cables. I can send my voice, text, image, you name it over RF. The era of cheap personal computers makes it easier than ever to do so as what used to be done with dedicated circuitry is software-defined and therefore very flexible.

[Anonymous No.1776531]

>>1776485
I'm not this guy, but I come with a similar question.

What do you guys do with your radios? I find radio fascinating from a science and engineering perspective, and I've recently started learning more about it. Bought a small handheld radio, all I've really managed to do with it so far is pick up the NOAA weather service, which granted is pretty cool. I'll definitely get some use out of that next time I go backpacking.

I have a lot of learning to do, haven't managed to pick up any police broadcasts or anything yet. But, when you're "playing" with your radios, what do you spend most of that time doing? While I find it extremely interesting, I have no interest in making small talk with some boomer in his radio shed.

[Anonymous No.1776569]

>>1776485
personally a mix of technique and talking directly to people really far away with some really basic equipment, playing with the propagation, settings, atmospheric conditions. Each person seems to have his own way to enjoy this hobby, some will spend days to tweak antennas, transceivers, others will do contests, SSTV or CW only...

[Anonymous No.1776570]

>>1768670
>Pioneer 2
DEAD LONG AGO
https://en.wikipedia.org/wiki/Pioneer_2

[Anonymous No.1776571]

>>1776569
still others point their helix to the sky
in search of rare contacts to nice places:
fr4om, jean-philippe at lg79ta, no english
soixante-dix-neuf
i need to work on my french

[Anonymous No.1776579]

Hello /ham/
I'm a brainlet studying telecommunications & this particular exam has various modulations on it.
Could you explain to a retard what the suppressed carrier in SSB-SC and DSB-SC actually means?
Thanks fellas

[Anonymous No.1776582]

>>1776579
Hello anon,
look on pic related, this is the spectrum view of a dual sideband carrier present signal, carrier suppressed means the big burst at the center frequency is not here : if you do this right, the power is not wasted in this useless carrier that doesn't support information
IIRC, the modulation circuit already generates a signal without a carrier, it is not done by filtering (that would be useless to save power)

[Anonymous No.1776584]

>>1776582
>IIRC, the modulation circuit already generates a signal without a carrier, it is not done by filtering (that would be useless to save power)
Ah, that's mainly what I was wondering

Thanks a lot anon

[Anonymous No.1776597]

>>1776582
One more question
I see both DSB-WC, DSB-LC and DSB-C terms used (with carrier, large carrier)
Are these interchangable or are they different things?

[Anonymous No.1776599]

>>1776597
No idea, for radio amateur only lower or upper side band with carrier suppressed is used, do you know what domain of application are these ones for ?

[Anonymous No.1776607]

>>1776599
Not entirely sure honestly.
I've seen one of the terms used to describe "conventional AM broadcast", though I can't seem to find that source anymore.

Any uni literature uses the term DSB-LC, our translated variant of Wikipedia lists the term DSB-WC but not LC, the English Wikipedia doesn't have any of these terms, rather just uses "AM" when comparing transmission with carrier to DSB-SC

And DSB-C I just found on google as I was searching for answers.

[Anonymous No.1776610]

>>1776607
>Any uni literature
My uni literature* oops

[Anonymous No.1776617]

How can I learn using GNURadio? I think it seems complex but it's easier than it seems.

[Anonymous No.1776621]

>>1776485
>what's the point of this hobby?
The FAQ goes a long way, I hope, to explain this.

t.your friendly FAQ editor

[Anonymous No.1776651]

>>1776571
>in search of rare contacts to nice places:
That place is called "Le Tampon," nice??
>i need to work on my french
I'd say.

[Anonymous No.1776658]

>>1776651
>Le Tampon
the buffer zone

[Anonymous No.1776663]

>>1776651
>>1776658
It can be a reference to a guy who was minting his own currency at this place in the 19th century

tampon is also pic related
source in French :
https://tel.archives-ouvertes.fr/tel-01950691/document

[Anonymous No.1776686]

>>1776651
>>1776658
>>1776663

I bet some strings were pulled getting that name.

[Anonymous No.1776687]

>>1776531
Depends on the radio. Baofeng?

[Anonymous No.1776694]

>>1776687
Yeah, that's what I picked up, a UV-82HP.

[Anonymous No.1776696]

>>1776663
stamp island (3B8) has already been activated but sweden is rarely heard because they are (officially..) limited to 100mW and need a 3m dish.

[Anonymous No.1776699]

>>1768446
death to this thread.

[Anonymous No.1776700]

>>1776485
to listen to old guys complain that no one is interested in a hobby that jumped the shark 30 years ago.

[Anonymous No.1776717]

>>1776658
To prevent further blood baths, you mean?

>>1776699
We reached 312, the thread is now going down, will fall off in 2 - 3 days time. Rest assure anon, a new one will appear. This one lasted 17 days so far, very comfy.

[Anonymous No.1776726]

Am I going to run into trouble running more than 50 watts trying to get across the world on ft8 with an ic-7300?

[Anonymous No.1776728]

>>1776726
yes, they built special rape camps for people like you.

[Anonymous No.1776734]

>>1776728
I can't tell if that's a 'wink, wink, stay out of the way of me' or if it'll actually stand to mess up more than just over-modulation for people around me. If that's the case, on quiet, poor reception places like 15 or 12M, I should be free to blast away.

[Anonymous No.1776740]

>>1776734
i blast away all day with 100w. should be fine

[Anonymous No.1776748]

>tfw empty cb

[Anonymous No.1776750]

>>1776734
it's common sense, look at your waterfall if you mess up other frequencies, ie keep the signal clean.
dont be a dick

[Anonymous No.1776751]

>>1776734
You'll get the retards, like yourself, to respond, but the others will ignore you.

[Anonymous No.1776753]

>>1775168
can't believe you think beer will make them poop more than Baufung radio.

[Anonymous No.1776779]

>>1776494
yes, as long as "radio" was more about "talking" than about "being passionate about communicating without having to pay for some official infrastructure".

Watching airplane traffic on FlightRadar24 is nice, but spotting an untracked military plane with your RTL-SDR and not finding it on FlightRadar24 nor google is somewhat nicer.

Then there are fashionable things like QRP modes, EME, airscatter, scat scattering, etc

>>1776570
I guess he meant Voyager 2

[Anonymous No.1776802]

>>1776717
>This one lasted 17 days
and I will kill the next one as I did this one and many others.

[Anonymous No.1776902]

[Anonymous No.1776913]

>>1776902
Kill your self

[Anonymous No.1776914]

>>1776913
This

[Anonymous No.1776915]

>>1776913
>>1776914
You wish.

[Anonymous No.1776973]

I really need to order in a signalink. Perhaps as a "reward" for passing my general exam on sunday? Any FT-817/818 anons in here?

[Anonymous No.1776975]

>>1776973
Congrats ! I have the yaesu SCU-17 for FT-818 and FT-450D to use with fldigi

[Anonymous No.1776979]

alright niggers I bought a pair of UV-5Rs on Amazon before they sell out from panic retards such as myself. I bought some ham license manuals to study last summer but got busy and haven't read much yet. How badly will I get raped if I used them infrequently on camping trips using FRS channels?

[Anonymous No.1776983]

>>1776979
check out :
https://upload.wikimedia.org/wikipedia/commons/c/c7/United_States_Frequency_Allocations_Chart_2016_-_The_Radio_Spectrum.pdf?uselang=fr

[Anonymous No.1776988]

>>1776975
Fug, I knew I worded that like a retard. I'm taking the exam this sunday lol. Being a tech is neat, but all the good shit is off limits (except amsat I guess).

Is the SCU better for digital than the signalink? How are you liking the setup?

[Anonymous No.1776991]

>>1776988
I didn't compare, as most of my gear is yaesu i went for the SCU, I think it's the same : USB serial ports to connect to the Tx for data and PTT, audio card for in and out.
My setup is raspberry pi 3 B+ (to be upgraded to 4) with fldigi and I really like it to mess around with RTTY or PSK31

[Anonymous No.1777001]

>>1776991
Nice. I'll have to read into it, looks like it may be more appropriate (and slimmer which is nice for packing around).thanks.

[Anonymous No.1777002]

>>1776979
Stick to low power and MURS and I doubt anyone will even notice you, let alone care.
151.820 MHz (Narrow)
151.880 MHz (Narrow)
151.940 MHz (Narrow)
154.570 MHz (Wide)
154.600 MHz (Wide)

[Anonymous No.1777091]

>>1776751
Without offering an explanation, you're solidifying my position it's just trolling. Nobody really works the world on 5 watts. They just want everyone else quieter so they break through the pileup.

[Anonymous No.1777093]

>>1776750
But I don't see my own transmission .. unless you're recommending I find someone else broadcasting theirs

[Anonymous No.1777120]

>>1777091
Not him but I did get Australia from 4-land with 25 watts using PSK31. Which I do realize is more than an S-unit above 5 watts but I could see it being a possibility. Still think you’re wasting your time trying to make super long distance contacts on 5 watts.

[Anonymous No.1777124]

>>1777120
I usually go between 25-40 watts, but seem to have maxed out around 70 countries and am getting hungry for a DXCC and am starting to question if I didn't fall for a trick. I've seen Kuwait and Oman recently from the US, but haven't reached them and am weighing the pros and cons of cranking it to 100.

[Anonymous No.1777141]

>>1777124
Fuck what anyone else thinks, as long as you’re not creating splatter just do it. Hell, some people use linears on the digimodes. Don’t know if I’d get that crazy but it’s a thing.

[Anonymous No.1777165]

>>1777002
thanks anon, I'll give that a shot.

[Anonymous No.1777207]

>>1777124
Tried a more directive antenna?

[Anonymous No.1777218]

>>1777124
It's not a video game checklist Rather, it's like fishing. You're not always going to catch something.

[Anonymous No.1777342]

>>1776973
I am looking for a HF transceiver, what makes this better tan, say, KX2 or KX3? Also, is it easy to modify and use with digital modes?

[Anonymous No.1777365]

>>1777342
Build one out of magnet wire and toothpicks, bro.

[Anonymous No.1777385]

>>1777365
Excellent idea, straight out of Blue Peter.

[Anonymous No.1777406]

>>1777342
I'm no expert, but the 818 might not be the best if HF is your jam. I got it because I primarily do VHF/UHF, and want to do some HF on the side. It's pretty easy to use with digi modes using stuff like the SCU the other anon has as it has a 6-pin din data port on the back, and has generally been made to accept a lot of equipment.

As for if it's the best, or better than the KX2 or KX3 I have no idea.

[Anonymous No.1777453]

I did this, but it doesn't work.

As you can see, this "Sequences_vectors" python embedded block that I created, has a list of bit sequences and it uses a for cycle to select each sequence and then return them to the next block (Repeat block) to go on in the flowgraph.
I did this to simulate a "Vector Source" block(that takes a _single_ list of bits), but that takes more than a single sequence of bits (in my case, as you can see in the code, there are three sequences).

I'd like to transmit each of these three sequences of bits. How can I do?

If I start the graph, it reports errors, I think because I can't return list but only single int.

In fact, even if it started without errors, I guess that the python embedded block wouldn't behave as expected. I think it would return one list and stops, since the "return" only works one time and not more than one (so the other two sequences can't be "returned"). So I think my code wouldn't work.

[Anonymous No.1777466]

>>1777406
Thanks for the information. And yes, HF is my main interest, VHF/UHF is just a nice bonus.

[Anonymous No.1777495]

** New Thread
>>1777491
>>1777491
>>1777491
** New Thread

[Anonymous No.1777618]

I am using "Vector Source" block. As you know, it's used with a list of ints. Of course, if I try to use more than a list, so if I use a list of lists, it gives me errors.

I also tried writing "[x for x in sequence]" in "Vector Source", but it doesn't work neither (same error of before).

Obviously if I write "sequence[0]" to select only the first sequence, it works, with no errors.


So my question is, how can I use more lists with "Vector Source" block?