The first serially made ARDF transmitter in CZ. Produced by Czech Central Radioclub's manufactory, it served for many years as a basic ARDF TX. The design is very simple, just an XO and PA (based on planar Si transistors) and two Ge transistors in multivibrator circuit as a keyer. There is an output transforming circuit to accomodate cca 5m wire antenna and counterpoise.

The transmitter runs on 12V from three "flat" 3R12 4,5V batteries - one of the cheapiest battery in the sixties ... The output is about 0,5W. Very rugged, simple and reliable construction. Enjoy the lovely soft and nice sound of it ... Schematics available.

All photos are © OK1UHU, 2011