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...

Schematic of the 4 tube radio, experimentally built in a way of the radio-pioneers (1910-1945). The radio acts as a cascade type receiver when the antenna coil has a high self-inductance, with lower self-inductances of the antenna coil you can put in a mixing process with the oscillator. Perhaps...

During the European Triode Festival 2006 (ETF06) the 100th anniversary of the Triode was celebrated. To honor this Triode Centennial, a copy of the DeForest Audion (the first triode) was made. This video documents the making of the ETF06 Triode.

Best viewed in high quality. Burt, K1OIK reviews the Flex 5000A Software Defined amateur radio.

In building the ham radio 40/80 meter inverted v antenna I ran into a slight set back. My SWR readings were very high and I first thought my antenna or cable to be bad. Fearing the worst I found the problem. A short circuit in the SO-239 connector in my MFJ-259B Antenna Analyzer. This is how I...

installation of new antenna and 7/8 hardline on top of co-op

VA7BC demonstrates Amateur Radio portable operation of the TenTec Argonaut V transceiver on 80m.

http://www.hfprojects.com Here is a short video showing the HF Projects VHF 6 Meter Solid State Ham Radio Amplifier..This unit will deliver 30W output with 1W drive..It is RF sensed & runs on 12VDC..For more info contact Virgil K5OOR in Houston, Tx.

Observations of electromagnetic (radio) signals on very low frequencies, 0 KHz - 10 KHz. Observed 10 may 2008, approx. 23.00 hour on 4,5. KHz: next to the original radio resonance of 4,5 KHz there is another resonance (spectrum on approx. 10 KHz), that comes in and fades away after 30 minutes....

With a little practice, it's easy to put the Buddipole Antenna back into the same carrying bag it came out of!