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Some FM transmitter questions.

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nettron1000

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1.) Can you build http://www.aaroncake.net/circuits/fmtrans.htm withhttp://www.kelvin.com/Merchant2/merchant.mv?Screen=PROD&Product_Code=440002?
1. No, but you can , just kidding. If you want to build that circuit by etching your own board, i'd suggest to first get a PCB design program, it will do a better job than free hand. I use ExpressPCB myself, its free and you can get it here:

http://www.expresspcb.com/

I havnt homebrewed my own PC board in years, i usually just send a completed design into ExpressPCB to be manufactured. I could never match the quality of their boards in a homebrew set-up, and actually i dont have the time for it.

2. You could try capacitive coupling , should work fine.

3. Heres a link to a very helpful bunch that i drop in to ask questions once and while, im sure they will help you anyway they can.
http://groups.yahoo.com/group/Homebrew_PCBs/?yguid=150730284
 

nettron1000

New Member
Quote:
2. You could try capacitive coupling , should work fine.


Sorry...what?

Somehow i didnt think that answer was going to do. I was assuming you had some knowledge of the circuit.

I cant post the schematic here since its not mine, but if you take a look back at the schematic you will see that its composed of two main parts. A pre-amplifier/modulator , which is Q2 and its supporting components, and a Colpitts oscillator , built around Q1 ( near the antenna ).

Elliminate everything left of the 9 volt battery and connect your CD player input to C3 and use a common ground connection.
 
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