The legendary DIY Russian UW3DI transceiver

The legendary and very famous HF transceiver was designed in the Soviet Union by Radio Amateur – Yuri Kudryavtsev (UW3DI) in 1968. The transceiver has been build on radio tubes. Latter his second version released on semiconductors (UW3DI-II). Since then the transceiver has been repeatedly replicated and improved / modified in the parameters by many…