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.

Polish Amateur Radio Station "Big Gun"

We’re back with the Active Cantenna to finally do some range testing. Thanks to Amateur Radio and a couple of video cameras, we put you right in the action. Ride “Shotgun� with Jim as we test WiFi’s advertised 3002 range. We were pleasantly surprised…. There are more great web sites...

Steve Galchutt brought this version of the "spud gun" (Pneumatic Launcher) to our Colorado QRP Club meeting. It was built for him by his friend John Evans (N0HJ) as described in the March '09 issue of the American Radio Relay League's QST publication. Amateur radio operators use all kinds of...