FM Transmitter Bug
Application Notes:
This small transmitter uses a hartley type oscillator. Normally the capacitor in
the tank circuit would connect at the base of the transistor, but at VHF the
base emitter capacitance of the transistor acts as a short circuit, so in effect,
it still is. The coil is four turns of 18swg wire wound around a quarter inch
former. The aerial tap is about one and a half turns from the supply end. Audio
sensitivity is very good when used with an ECM type microphone insert. David's
email : radio_david@yahoo.com
Title: FM Transmitter Bug
electronic circuit
Source: www.electronics-lab.com
Published on: 2005-02-03
Reads: 1779
Print version:
Other electronic circuits and schematics from RF circuit
-
FM radio
-
Bipolar Regenerative receiver
-
Micro Power AM Broadcast Transmitter
-
FM voice transmitter for Band 2 VHF
-
6 x 6 Loop Antenna
-
FM transmitter
-
4 Band Double Tuned Preselector
-
Active Antenna for Medium Wave
-
CB receiver
-
Linear FM 50Watt with BLY90