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
Media Contact: Cecilia Sulhoff, 202-418-0587 cecilia.sulhoff@fcc.gov For Immediate Release FCC MODERNIZES PERSONAL RADIO SERVICES RULES — WASHIN... Read more
1/2-wave, 5-Band HF Cobweb Antenna Restricted space spoiling your operating fun? MFJ-1835 puts your call back on the map! This fiveband (20, 17, 15, 1... Read more
Es’hail-2 Graham Shirville (G3VZV) & Dave Crump (G8GKQ) update us on Es’hail-2 and its amateur radio payload at the AMSAT-UK International S... Read more
Slow-scan television (SSTV) transmissions from the International Space Station (ISS) are scheduled for December 8-9. The SSTV images will be transmitt... Read more
Source: ARRL The ARRL has filed a formal complaint with the FCC, alleging that The Home Depot home improvement chain has been illegally marketing cert... Read more
The greatest tool any underground utility contractor could own. Bury wire and conduit faster and easier without the mess. Read more
By BOB BECKSTEAD MASSENA — Some J.W. Leary Junior High School students have discovered the joys of communication using technology that’s more t... Read more
ACOM, Bulgaria manufactures a range of 8, 10 and 12 element HF log-periodic antennas. Their main features are: designed and produced to give top perf... Read more
Cyprus Headquarters (HQ) team to participate in IARU HF World Championship contest (11-12 July 2015) Several contest stations across Cyprus will hit t... Read more
Runbo P12 Rugged Waterproof Tablet PC DMR Phone PDT POC MPT1327 UHF VHF PTT Analog Radio The Runbo P1 is the first rugged android tablet pc designed... Read more
LOTW Updated TQSL configuration file released (config.xml v11.7) — Config.xml version 11.7 has been released. This is a update release containi... Read more
Sacramento Valley ARES Section Emergency Coordinator Greg Kruckewitt, KG6SJT, reports that Amateur Radio Emergency Service (ARES®) volunteers are read... Read more
Earlier this year, following a challenge that resulted in the realignment of several club scores in the ARRL 10 Meter Contest, it became clear that th... Read more
Sometimes the best direction to send your signal is straight up! Near vertical incidence skywave, or NVIS, is a skywave radio-wave propagation path... Read more
“The newest Dual Band DMR HT from Retevis is the RT-52. With a dark screen and white fonts, this radio has a unique look from the start. The cod... Read more
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FCC MODERNIZES PERSONAL RADIO SERVICES RULES
Antenna 1/2-wave, 5-Band HF Cobweb Antenna – MFJ-1835 Time Lapse Video
Es’hail-2 geostationary amateur radio transponders talk
Slow-Scan Television Transmissions Scheduled from ISS
ARRL Complains to FCC About The Home Depot’s Marketing of RF Lighting Devices
Bury 100ft of wire 10in deep in 10 minutes without any mess
Massena junior high school students honing skills in Morse code, ham radio operation
ACOM HF Log-periodic antennas
Cyprus Headquarters (HQ) team to participate in IARU HF World Championship contest
RUNBO P12 UHF DMR
Updated TQSL configuration file released – LOTW
Amateur Radio Emergency Service Volunteers Ready to Assist with California Evacuations
ARRL Announces Club Competition Eligibility Changes
![NVIS: Near Vertical Incidence Skywave [ PodCast ]](https://qrznow.com/wp-content/uploads/2017/11/24180150-190x122.jpg)
NVIS: Near Vertical Incidence Skywave [ PodCast ]
Retevis RT52 Dual Band DMR Radio
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