FM transmitters

Two FM transmitters were built recently.

The first transmitter is based on 7 2n3904 transistors:

OLYMPUS DIGITAL CAMERA

http://forum.allaboutcircuits.com/blog.php?b=517

The second transmitter is based on 3 2sc1740 transistors:

OLYMPUS DIGITAL CAMERA

Some resistors were made adjustable especially the emitter resistor and the bias resistors. Using other transistors than the originally suggested 2n3904, this is absolutely neccessary.

The schematic for the second transmitter:

FM transmitter pic + schem

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