/diy/ - Do It Yourself

>>2779936
forgot to add the circuit, my bad.

>>2755510
Hello /ohm/ ! Came here from /ham/ since I still have some unanswered questions. I am trying to build simple FM transmitter according to pic related. L1 is just standard choke with 10uh and L2 is 0.4mm copper wire wrapped 6 times around 2mm nail. Here is the video with working transmitter.
https://www.youtube.com/watch?v=YSrp4l74yvE [Embed]
I have tried to use BC548 and make both coils myself but I havent had any actual successes. my crystal has 4 pins and looks like this (I think that both middle pins are just GND)
https://imgur.com/a/0bB9YhI
I am pretty new to electronics (and very, very new to radio overall) so I apologise in advance if I am doing some simple stupid mistake. My main questions are:
- Can I just use 2 axial chokes instead of 1 choke and a coil? If so, can they both just be 10uH?
- Is there any decent tht equivalent to BFR93 or should I really use this transistor?
- Is my crystal good enough or should I get another one? /ham/ suggested that there might be something wrong with it.
I am mounting it the same way as this guy does in this video and powering it from external DC power supply. I monitor the signal using RTL-SDR. If there are any things I should change, It would be nice if you could point it out. Thanks in advance /diy/ people!

Hello everyone. I am trying to build simple FM transmitter according to pic related. L1 is just standard choke with 10uh and L2 is 0.4mm copper wire wrapped 6 times around 2mm nail. Here is the video with working transmitter.
https://www.youtube.com/watch?v=YSrp4l74yvE
I have tried to use BC548 and make both coils myself but I havent had any actual successes. my crystal has 4 pins and looks like this (I think that both middle pins are just GND)
https://imgur.com/a/0bB9YhI
I am pretty new to electronics (and very, very new to radio overall) so I apologise in advance if I am doing some simple stupid mistake. My main questions are:
- Can I just use 2 axial chokes instead of 1 choke and a coil? If so, can they both just be 10uH?
- Is there any decent tht equivalent to BFR93 or should I really use this transistor?
- Is my crystal good enough or should I get another one?
I am mounting it the same way as this guy does in this video and powering it from external power supply. I monitor the signal using RTL-SDR. If there are any things I should change, It would be nice if you could point it out. Thanks in advance /diy/ people!