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
“Two Chinese companies, Radioddity and Baofeng, have teamed up to bring you the US$75 dual-band FM/DMR radio housed in the old UV-5R package. Th... Read more
A Russian MAI-SSTV event is planned from the International Space Station for Wednesday, June 5 from 12:00-16:00 GMT and June 6 from 11:30-15:30 GMT. A... Read more
An emergency communications exercise primarily involving Amateur Radio stations in the countries of IARU Region 2 (IARU R2) Area G — Argentina, Chile,... Read more
High Performance, Ultra-Rugged 30m Through 10m 6 Band (With Feedpoint Mounted ATU) Vertical Dipole Under 16 Feet Tall! No Radials! Force 12... Read more
Solar activity has been fairly boring during the past few days but a surprise solar flare woke us up. A long duration C7.41 solar flare peaked today a... Read more
Grounding and Bonding for the Radio Amateur Grounding and Bonding for the Radio Amateur by Ward Silver, N0AX, is now available from ARRL. Proper stati... Read more
Ham exams are administered by volunteer examiners, and you can become one yourself! Find out how to help. Read more
NEWS UPDATE – Jorge, TI2HMJ will again be active from Cocos Island TI9/TI2HMJ between November 11-15, 2015. QRV when time permits as the trip is not a... Read more
Ground Plane Antennas “Ground Plane Antennas” is the topic of the new (December 20) episode of the “ARRL The Doctor is In” podcast. Listen…and l... Read more
Version 2.00 NEW FEATURES Updated the Memory Book to include eight customizable Memory Groups Updated Scan Band selection “ALL BAND” scans both... Read more
THE INRAD W1Ham radio never sounded so good! Comfortable over-the-ear earpieces with large diaphragm high response speakers Full stereo reception to a... Read more
Amateur radio licensees and candidates will have to provide the FCC with an email address on applications, effective sometime in mid-2021. If no email... Read more
Dayton Amateur Radio Association (DARA) Treasurer and Hamvention® spokesperson Mike Kalter, W8CI, said this week that everything is falling into place... Read more
DESCRIPTION Rugged Portable DC Power Management System with built-in High-Efficiency Battery Charger! > High contrast OLED display > Power manag... Read more
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Review and Tutorial on Radioddity/Baofeng RD-5R DMR Dualbander
ISS Slow Scan TV June 5-6
IARU Region 2 Area G Announces Emergency Communications Exercise
SIGMA 3010 HD: 10 THROUGH 30 MHZ HEAVY DUTY VERTICAL DIPOLE FOR USE WITH AUTOTUNER
C7.4 solar flare
Grounding and Bonding for the Radio Amateur
Become a Volunteer Examiner by KE0OG
TI9/TI2HMJ – Cocos Island
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Ground Plane Antennas [ “ARRL The Doctor is In” podcast ]
Yaesu FT 550L
INRAD W1 Headset with Boom Mic.
FCC to Require Email Addresses on Applications
Hamvention Organizers “Counting Down the Hours,” Anticipating up to 35,000 Visitors
Buddipole PowerPlus | Rugged Portable DC Power Management System
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