Simulating with real audio is awesome and easy!

Use REAL audio to simulate your filters in LTSpice. Two examples are given. A two stage elliptical SSB filter is evaluated. And a two-stage multiple feedback CW filter is tested. Both are ready to include in your receiver. […]

Winner of the G2NJ Trophy !!!

The G2NJ Trophy is sometimes awarded for a really good technical article, and sometimes for an outstanding contribution to international QRP. This year’s winner described a Cross-coupled Double Balanced Product Detector in SPRAT 191. The winner is Cor, PA3COR”Steve G0FUW, Sprat 194

Needless to say it was a complete surprise! I feel very […]