DARPA, through its Innovative Vacuum Electronic Science and Technology (INVEST) program, aims to develop the science and technology base for new generations of more capable vacuum tube electronic devices (VEDs).
Those microwaves that heat the food in your microwave oven come from a magnetron, the vacuum tube that made radar possible in the first half of the 20th century. Traveling wave tubes (TWTs), not solid-state amplifiers, generate the strong electromagnetic signals in communication satellites because of their exceptional on-orbit reliability and high power efficiency. Tubes are not dead!….READ MORE
On the AMSAT Bulletin Board Dave KG5CCI writes: On Saturday, September 5 at 1812 UTC I made a scheduled contact with Manuel, EA5TT, using AO-7 Mode B,... Read more
Download the .pdf File CW PY 2014 CW DX 2014 CLUBES 2014 SSB PY 2014 SSB DX 2014 Visit the oficial site: http://www.cvadx.org/ Read more
ICOM IC-7300 IC-7300 HF/50/70MHz Transceiver (advertising image) Right click on the image and click ‘Save picture as..’ Read more
David K3LP Talks About the VP8 Operation Read more
“I sent a message to the international space station, it transmits it back down to groundstations in it’s view and those stations send the... Read more
Model Frequency (MHz) Gain (dBi) Length Feedline VT-14 144-148 2.6 36 in. 3 ft. RG-58 VT-22 222-225 2.6 25 in. 3 ft. RG-58 VT-44 440-450 2.6 16... Read more
David, ZS1BCE (also ZD9A) is returning to Marion Island in the new year and will be active as ZS8Z when time permits. He will remain on the island (wo... Read more
The book, SOS at Midnight, by Walker Thompson, inspired Glenn Elmore, N6GN, to become an amateur radio operator. Son of a Caltech physicist, Glenn... Read more
About HAARP: The High Frequency Active Auroral Research Program (HAARP) was an ionospheric research program jointly funded by the U.S. Air Force, the... Read more
Doug Lung / RF Report “ Techniques could be used for digital broadcasting in the AM band or shortwave broadcasting Ham radio operators ha... Read more
Es’hailSat has tweeted their geostationary satellite Es’hail-2 is expected to be launched by SpaceX in the 4th quarter of 2018. Qatar’s Es’hail-2 sate... Read more
K1N Navassa Get past Gary trying to work K1N on cw (quit laughing) and you’ll get to the talk at the Hamvention®. Glenn Johnson W0GJ and Bob All... Read more
NanoVNA SAA2 Version 2 Vector Network Analyzer – Ham Radio Antenna Analyzer Read more
Stan, WS5K plans activity from Dar Es Salaam, Tanzania as 5H2SF between January 26 to February 10, 2016. QRV on HF bands. Read more
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New ! AO-7 Distance Record
CVA Contest Results 2014
ICOM IC-7300 – WallPaper HD Photo
David K3LP Talks About the VP8 Operation: Ham Nation 213
Tweeting via the ISS
Camouflaged Ham Radio Antenna
ZS8Z – Marion Island
QSO TODAY Episode 056 Glenn Elmore N6GN – WSPRnet for VHF and UHF propagation
HAARP Open House this weekend !
List of Experimental Licenses Reveals Interesting HF Data Comm Experiments
Launched announced for Es’hail-2 carrying ham radio transponders
HRN 205: Dayton DX Forum Part 3 – K1N Navassa on HamRadioNow
NanoVNA SAA2 Version 2 Vector Network Analyzer – Ham Radio Antenna Analyzer
5H2SF – Tanzania
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