1W PLL Transmitter with MC145152
Following 1W PLL transmitter exciter provides stable, low noise
operation. Transmitter uses a PLL frequency synthesizer built with
MC145152 which covers the FM band in 100kHz steps. The VCO uses MV2109
varicap diode to automatically tune to selected frequency via SW1 dip
switch. output stage uses 2N4417 RF power transistor and provides 1W of
RF power. With good antenna expected transmission range is 2km.
Transmitter may be built on a double sided PCB, with top side copper
left mostly undisturbed as a ground plane. The copper is removed only
around non-grounded pins. The ground connections can be soldered on the
top side, so it’s not necessary to have plated-through holes.
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