(Click Picture to Enlarge)
(PCB showing built in tank coil)
9 Volt FM
This new 9
Volt FM Transmitter Kit can transmit over 900 feet in the open depending on
aerial used. The tank oscillator coil is built into the circuit board,
has been tinkered with to give the best distance and stability for it's
size. The battery supply rails have been well tied together with
respect to radio frequencies. The tracks are also thicker
making the fm transmitter circuit a single ‘solid’ block eliminating
RF currents in different parts of the circuit. This also means the battery
no longer has RF on it
makes the whole unit a lot more frequency stable.
Can be tuned
band - DIY Kit 18.
- L: 1-3/4" W: 7/8" H: 1/2"
- Requires 9 Volt Battery
- Transmission frequency is user
- Transmitter can be listened to on any FM radio.
CK217.pdf for complete
details, including schematic and theory of operation. Requires Adobe
Acrobat Reader available at