DIY FM Broadcast Transmitter part 2

This is part 2 explaining the technical aspects of the transmitter and amplifier in detail. The battery died at the end of this video, so you can watch the rest of part2 in the part 3 segment.

Category:

Science & Technology

Tags:

• DIY
• FM
• RF
• broadcast
• transmitter
• amplifier

[gbowne1]

Your LM324.. what actual part no. and manufacturer did you use. Mine was a TI chip.

I used a few other chipsfor the display and the VU driver LM3914/3915/3916 and the TLC5940.

[THEtechknight]

@gbowne1 I just used what I had on hand... I didnt feel like redoing alot of it. so i used what I had.

one of these years i might make one mainboard with everything integrated onto it including the PLL circuitry. it just depends.

[gbowne1]

Mine has a lot of the same components, say except for the tunecast.. but it will output 20, 40 and 50w depending on how I have it set up, but its enough to drive a 500w FM amp.

[THEtechknight]

@gbowne1 That all depends on the components you use as well. But in RF design, the basic circuit layout is pretty much consistent. i guess its all in the components you use and the values. As mentioned before, This one is crude, its amazing it works at all.

I do need to redo the amplifier board one day, and get a full pi filter in there for proper impedance matching.

[gbowne1]

Thats a good idea. I can help you if you need some help. I'm no RF engineer but I can help.