/diy/ - Do It Yourself

>>487424
So you want a bogus test to go along with your self-diagnosed assburgers, fedora and MLP toys?

Precision components cost money. If someone's selling them for cheap you don't want them. Also, as everyone said the previous time you asked, you don't need them.

>>487424
Contact these people for foster care related stuff,

http://ocfs.ny.gov/main/

Try these places for PCB parts,

digikey.com
mouser.com

>>487426
>a bogus test

A low IQ scorer spotted.

>>487426
I'm sorry, but do you have tourettes? Because I'm not building garbage components so, sorry if you're butthurt that I actually care about quality electronic components because I don't want awful parallel circuits. I guess you're one of those guys that use capacitors in the signal path too.

And so what if I want to know. Why do you care? Go somewhere where you'll be appreciated, because it's clearly not here.

>>487429
Thanks man, I really appreciate it.

And I've gone to digikey and mouser but some of the parts I'm probably going to have to order from Reidon or another high quality, high focused manufacturer.

Also, if I recall correctly my score was 180, but I know that IQ tests are BS, especially at a young age. It was just an inquiry to which I've been told before and don't recall my score... I was 6 so I had no idea what the test was (also because they didn't tell me what I was doing it for)

But seriously, thanks. A lot of people are just self-conscious trolls that get on the internet to account for their inferiority complex so I appreciate a real answer that doesn't include a lot of butthurt

In general, if you have need for tolerances that close, you can afford to spend the time metering and matching the components yourself.

Not a far leap, but have you actually checked with the adoption authority whose care you were under? Generally those records are a personal matter and as an adult you should be able to have access to them.

>>487433
Righto, you don't understand electronics. Also tanks for confirming that the only people who go on about IQs are competely insufferable assholes.

>>487424
>tolerances of 0.05% or less
you don't need that

>>487426
>9 out of 10 low-scoring people blame the IQ test for being faulty as the reason they scored so low

>>487452
>implying I've even taken a test
>implying a discredited test is worth anything

>>487449

He was told that last time as well, by multiple anons. And here he is once again, wanting 0.05% resistors, because anything lesser would be "garbage".

>>487466
>being this asspained

There has never been one end all IQ test. There's many IQ tests and they are not discredited. Perhaps you should learn what that word means?

>>487472
You sound defensive. Like your butt maybe hurts a bit?

>>As well, I'd like to start building my own amps for speakers so if the aforementioned topic wasn't okay, then my next question is, is there a place that I can find high quality resistors/capacitors (tolerances of 0.05% or less) for cheap?

what a complete fucking waste of time

Retake the IQ test, that score will be extremely outdated and if you're using it for bragging rights.
>I've actually received more praise for my ability to burp really loud as compared to my "above average" IQ.

Tolerances => 0.05% or Cheap pick one.
That 0.05% is not going to make very much difference to human ears and the speakers are undoubtedly incapable of a less than 0.05% accuracy when reproducing the sound anyway.

Besides, why are you spending that much on a first amp? Firsts have a high possibility of releasing the blue smoke.

>>487475
You meant to reply to >>487466

>>487424
You have to be reading specs incorrectly and shifting the decimal point two places to the left, or you just don't understand electronics at all, or you're a shitty troll, because we've all seen this thread before, and you're going to hear the same thing you heard last time:

You do not NEED 0.05% resistors for audio amplifiers. Any design/schematic that insists you need to use such expensive passive components is either in error, or the design sucks.


For everyone else reading this thread, in case you didn't know: Even 0.1% resistors are only used in instrumentation applications, where measurement accuracy is paramount, and even then they're used only where necessary. If any other kind of circuit (like an audio amplifier) *requires* resistors of such precision just to operate properly? It's very poorly designed, then, and you should find a better design to build.

>>487452
>9 out of 10 low-scoring people blame the IQ test for being faulty as the reason they scored so low

And what does that prove exactly? Bayes theorem says hello.
Also: 9 out of 10 people who use "9 out of 10 people" in their sentence are making their numbers up.

>>487511
dubs confirm

>>487511
30% of statistics like yours are made up on the spot.

>>487526
93% of annons confirm.

>>487528
This thread is 100% dildos.

I always use 0.01% 5ppm resistors as pullups on all my switch inputs so the inputs are as quiet and reliable as possible. Sure, it's a little pricey, paying $7.70 each for them, but the minimum order quantity of 50 each means I'll have plenty on hand for my projects, and after all anything else would just be trash.

>>487531
trust this man. he is true anon

>>487531
Wow, you too?
I like to use 0.01% resistors as current-limiters for the case LED's in my gaming rig so they're always at optimal brightness.

>>487537
>>487531
Do you have a source for 0.01% tolerance panel-mount potentiometers? I want to build a guitar amp and want the volume control knob to be as accurate as possible, using any other sort of potentiometer would just be trash.

OP, the real world just doesn't have the accuracy of theory. Everything is a trade off between cost, efficiency and practicality. It pains me too.

>>487531
9/10

IQ tests can give a general idea of a persons intelligence based on a lot of assumptions of the persons experience. Not all people have the same experience though. I scored high and everyone I know says I'm highly intelligent but that doesn't mean that the test is accurate. An isolated farm boy could be the smartest person alive and score low. It's more of a knowledge test.
>I was a foster care child
Your experiences are different from most peoples. Why would you be interested in judging yourself on the majority's scale?

Anyone who wants to brag about their IQ should go to /sci/.
They are the kind of people who are more interested in their assholes rather what they can do with their smarts.

Dear anon,

I have had four IQ tests done in my life at 4 year intervals between 5-21. All the tests done before age 18 are not reliable for any conclusive results because they merely indicate your progress compared to the rest of your age group. At 21 I scored 133, and previous diagnoses of various learning disabilities were confirmed.

It's just a number, it's not your life.

The reason I WANT 0.05% Tolerance Resistors is because they give EXTREME stability and they also prevent sound drift.

Also, I didn't ask any of you what your opinion was, just where to get them. If you give me some reasonable evidence as to why my Class A amp should use resistors with a greater tolerance than 0.05% then go ahead. But for the smoothest operating systems it's actually quite necessary, and in my mind, will yield better results.

I appreciate those that help, as opposed to those that ignorantly post.

>>487547
I know these things are pretty hard to come by and that I'll have to pay a lot but I just thought maybe I was somehow looking in the wrong places.

And I don't judge myself by normal societal standards, it was just out of curiosity that I asked.

For those of you that claim IQ Tests are about bragging and looking smart, well they are for people that actually care about it. Simple curiosity does not equate to hinging my intelligence upon a number to try and brag.

>>487424
>>487433
>>487436
>>487562
>>>/b/
If you really thought you could come in here, of all places, and actually get away with this juvenile trolling crap, then you're sadly mistaken.

>>487562
>Class-A amplifiers
>0.05% resistors
Because back in the days of vacuum tubes, they made sure that those huge axial lead carbon comp resistors they used were all 0.05%, LOL.
>sound drift
top lel

>>487562
>smoothest operating systems

I run Gentoo on my amp.

>>487570
OP should get in a supply of pic related, it'll make his system run real smooth.

>>487569
No. Just no.

1) thermal noise on carbon comp is ridiculous
2) metal film is the way to go
3) a tolerance of 0.05% ensure better analog audio signal
4) I've found what I needed so you can go back to not being helpful elsewhere

>>487562
>Tolerance
>stability
Different parameters on the spec sheet.

>sound drift
Just because you took a test it doesn't make you an expert on everything.

>>487585
You need to report this thread, it's just trolling, and /b/tards need to have a clear message sent to them that they can't hack it on /diy/.

>>487583
Draw a complete schematic for a Class-A amplifier, including power supply, on paper or MS Paint, and post it, along with a complete theory of operation, and be prepared to answer questions.

>>487589
>>487587
And here I thought you guys were the trolls. And I'm definitely not posting schematics for an $8000 amplifier I designed because 4chan

>>487585
They were never intended to be on the same spec sheet for the resistors. The stability refers to the parallel circuitry.
And I told you I don't care about the test, so stop trollin

>oh look an interesting thread on amps
>wait a sec...
>yep, OP is a fag

>>487599
>$8000 amplifier I designed
>$8000
>Class-A
Ah, I see now. You're a crook, and you prey on retarded audiophiles who are willing to pay $1000 for a piece of speaker wire or $800 for a wooden knob. Either that or you're just another retarded troll from /b/ who can't even light an LED without asking someone how to make it work. Either way, fuck off.

>>487608
You're pretty butthurt. And I'm a crook? The design's for me. Not anyone else. ME. So go along and continue the butthurt parade. Shame on you for being on DIY
Oh, and you should go back to /b/

>>487424
You don't need low tolerance resistors and capacitors, precision equipment is made with temperature stability, not with extreme low tolerance components. You get good low temperature drift components and tune the circuit for the precision.

OP, you should know that unless you match your transistors to 0.001%, this is all a waste of time.

>>487626
please get out right now, everyone agrees.

>>487634
Thanks for the advice. And honestly the only reason I was doing it was because I have a tendency to just go over the top, specifically with my audio equipment, so I'll probably end up doing it anyway. Even a small improvement is an improvement nonetheless.

And what temperature rating would you hazard a guess for the capacitors/resistors?

>>487653
>And what temperature rating would you hazard a guess for the capacitors/resistors?
you're going to need your IQ score from when you were 6 to calculate the temperature rating

>>487653
audio equipment is absolutly not critical in temperature performance, even a 15 ppm drift is complete overkill (mainly due to output transistor drift that is larger then that). I would reccomend a 50 ppm resistor/capacitor as the best compromise between performance and price. 50 ppm drift over 50 degree C in well tuned audio equipment is impossible to detect with human hearing.

>>487662
but i can't say this for sure, since you need a complete circuit to be sure.