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
Astronaut Tim Peake invites Raspberry Pi challenge Video produced by Dougal Shaw – Read Full Article on BBC Read more
“Since my 6m Delta Loop seems to work pretty well I decided to build one for the 30m band to be used with my Spiderbeam 12m mast. Unfortunately... Read more
— WIDEBAND DIRECT SAMPLING RECEIVER —- JAN 2020 SPECIFICATIONS 2 switchable HF Antenna inputs direct sampling 1 VHF Antenna input direct s... Read more
FlexRadio Maestro Peter Waters G3OJV and Justin Johnson G0KSC of Waters and Stanton, Europe’s Hamstore, took a visit to Austin Texas USA last we... Read more
PU2WDX, will be active from Fernando de Noronha Island (IOTA SA-003) 3 to 5 May 2015 as ZW0FWA. QSL via home call direct and LOTW Read more
The ARRL Contest Branch has announced that some contest award certificates now are available for download from the ARRL website in PDF and JPEG format... Read more
“Jim Heath W6LG shows his newly installed antenna and tower at his residence. The tower has a maximum height of 30 feet as restricted by Placer... Read more
Ham radio gaining new support in digital era _<span id=”mce_marker” data-mce-type=”bookmark” data-mce-fragment=”1... Read more
“We made a long wire vertical antenna suspended from a helium balloon over the river, at 25 watts and an MFJ 993b autotuner to tune it on 40 met... Read more
Coaxial cable quality review – Read full Article: Read more
Bob Bruninga WB4APR invented APRS. He’s had plenty of help, but it’s still his show. While most of us use it to show where we are on a map... Read more
The January issue of Digital QST is now available! If you are an ARRL member, you can start reading at http://www.nxtbook.com/nxtbooks/arrl/qst... Read more
VHF/UHF Mobile Antennas Antenna, VHF/UHF, Glass Mount, 144-148/442-448 MHz, 100 W, 32.75 in. Max Height, 14 ft. RG-58, PL-259, Each Brand:LARSEN ANT... Read more
The 507 Patriot utilizes a chipKIT Uno32 prototyping board which give users access to an Arduino-based programming environment. With its 32-bit... Read more
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Astronaut Tim Peake ( KG5BVI ) invites Raspberry Pi challenge
Building a Delta Loop Antenna For The 30m Band, Part 1.
Elad FDM-S3 SDR
The first UK demonstration of the FlexRadio Maestro
ZW0FWA – Fernando de Noronha SA-003
Some ARRL Contest Award Certificates Now Available for Download
Rotating Tower For Ham Radio 30 Feet Tall At Jim W6LG’s House And Can Be Used For Emergency Comms
![Ham Radio Gaining New Support in Digital Era [ FOX News ]](https://qrznow.com/wp-content/uploads/2016/09/foxnews-190x122.jpg)
Ham Radio Gaining New Support in Digital Era [ FOX News ]
Build an HF long wire balloon antenna
Coaxial cable quality review
APRS Forum at the 2016 Hamvention® on HamRadioNow
The January issue of Digital QST is now available!
Larsen VHF/UHF Mobile Antennas KG2/70CXPL
Ten- Tec 507 Patriot – Open Source Arduino-based SSB/CW QRP Transceiver
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