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The X-Band microwave motion detector was moved to 10.25GHz. We explore the output of the HP x421A detector diode attached to the HP x532A X-Band wavemeter, and verify the frequency of operation.

The X-Band microwave motion detector was moved to 10.25GHz in Part 1, and we explored the diode output in part 2. In part 3, we examine the pulse width and pulse repetition rate with the oscilloscope, and draw a conclusion about the diode modulation.

This is a slide show overview prepared by Scotty showing his work with converting PC Power supplies to ham radio use presented at the August 2007 FSARC meeting.

This is a slide show overview prepared by Scotty showing his work with converting PC Power supplies to ham radio use presented at the August 2007 FSARC meeting.

PSK31 QSO on 40m using Digipan v20 Live video of part of a QSO on 40m using just 10 Watts at each end 100% copy over distances of c.1000Km is normal. First the complete GUI with the Multi QSO panel showing other QSO's. Then for clarity on YouTube a closer view.

Scheveningen radio PCH

PC100H - Special event station - 100years Scheveningen radio PCH 1904 - 2004

Silent b/w movie about PA0ASD in 1935

This is a one valve [tube] radio that believe it or not I constructed 48 years ago. It remained lost but was discovered again during a recent house move. The valve used is a battery R.F. pentode dating from around 1948 on a B7G base. The type number is DF91 or the American equivalent, the 1T4....