Tuesday, 12 May 2026

Building Sovina 40M Class E CW Transmitter with BS170 MOSFETs

The Sovina 40m Class-E CW Transmitter is a compact and highly efficient HF transmitter designed specifically for amateur radio operators who enjoy homebrew QRP equipment. This circuit is based on the original work by PY2OHH (Roberto S. Soria) and has become popular due to its simplicity, excellent efficiency, and clean RF output. This CW Transmitter is particularly noted for its reliability and performance.

Sovina 40m CW Class-E Transmitter

Building Sovina 40M Class E CW Transmitter with BS170 MOSFETs

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