Simple Radio Transmitter

he circuit shown here is of simple radio transmitter which is used to transmit voice signal up to 20M and is listen in radio resistor. The complete circuit is built around a single transistor followed by micro-phone for and a MW antenna for any old radio. If the sound is not clear at the receiver, then adjust ferrite core of MW coil and fixed it where clear sound is listen.

simple radio transmitter

PARTS LIST OF SIMPLE RADIO TRANSMITTER

Resistors (all ¼-watt, ± 5% Carbon)
R1 = 10 KΩ

R2 = 47 KΩ

Capacitors
C1 = 10 µF/16V

C2 = 0.01 µF

C3 = 470 pF

Semiconductors

T1 = BC148
Miscellaneous
Medium wave coil

Microphone

TV Antenna