im very willing to pay anyone who can design a very small fm transmitter that gets its source from a 1/8th jack (ex: portable cd player, mp3 player, walkman etc) it would need 2 to 4 fixed frequencies and a range of around 10-20m - heres the kicker:
it needs to be extremely small, around 2 cm x 3 cm or smaller if possible.
i need the schematics + a few (2) working prototypes and i need it within the next 3 days. must be stable. the audio on the receiving end needs to be crisp & true stereo if possible.
i'll pay a few thousand US $ depending on quality. email me at rootuddha@gmail.com with a phone # where i can call you to get it worked out.
there are transmitter plans available that use tunnel-diodes, problem being getting the tunnel diodes, most get scooped up by test equipment service people ( Tektronix comes to mind )
do a search for things like " olive FM transmitter, or pico FM transmitter"
only instead of the mic a 1/8 plug - i picked up basically the same thing today at a local shop, replaced the electret mic with a 1/8th plug and it worked - but terrible background noise i hate being an amateur