“How high should a dipole be? What happens if it’s too low or too high? We turn to EZNEC antenna modeling software to see that the old rule of thumb of one half wavelength is correct. But there are lots of things going on!”
Equipment
DX Engineering Ladder Line Surge Protector DXE-LLSP
Built by popular demand, the DX Engineering Ladder Line Surge Protector is ready to be placed in line with your balanced feedline antenna system! For... Read more
ICOM IC-7300 analogue {analog} s-meter prototype testing
ICOM IC-7300 Features Frequency: 1.8～200MHz Power Range: 30/300/3000W Input Connector: N Female Cross needle SWR and Power indications in one meter un... Read more
Xiegu X1M Pro QRP Transceiver
Frequency range RX & TX: 100 kHz ~ 30 MHz* Modes: USB & LSB & CW Power output: 5 Watts Operating voltage: 12 vdc Operating current: 0.35... Read more
The MTR4b! KD1JV “Steve Weber” Designs – Produced by LNR Precision 80M/40M/30M/20M in Machined Aluminum Case!
The MTR4B 4-Band Mountain Topper KD1JV “Steve Weber” Designs – Produced by LNR Precision 80M, 40M, 30M, 20M 3-4 Watt Output at 12VDC... Read more
Review
The New SDRplay RSPdx receiver – First Impression: Excellent!
“Today i have received the new SDR receiver from SDRplay, the RSPdx and was eager to turn it on and do some tests receiving on HF and VLF. Altho... Read more
Does the ICOM IC-7610 equal two IC-7300?
Does the ICOM IC-7610 equal two IC-7300? Read more
Icom ID-51E PLUS2 Unboxing
The D-STAR Evolution continues with the ID-51A PLUS2! Over the years, Icom has taken the D-STAR protocol to new levels with each generation of portabl... Read more
Antenna
Antenna Design and Measurement Software
AnTune software assists in designing antennas and RF impedance networks. Their software runs on PC/Windows and can communicate with a Vector Network A... Read more
Inflating The Dual Band 2m/70cm version of the Air Antennas, opening up repeaters 23 miles away
Inflating The Dual Band 2m/70cm version of the Air Antennas, opening up repeaters 23 miles away Read more
IS THIS THE ULTIMATE 2M CONTEST ARRAY?
2 x el G0KSC / InnovAntennas rigid quads with additional parasitic reflector. 16.64dBi/14.48dBd when placed 20′ (5m) above average ground with m... Read more
TRI-BAND MOBILE ANTENNAS – NGC – Comet Antennas
MOBILE ANTENNAS Fold-Over Hinge Most Comet mobile antennas over 29″ length have a fold-over hinge built into the base section of the antenna. It is NO... Read more
App - Mobile
Shortwave radio distributes smartphone apps
Imagine being able to download an app…without the internet. Well, it’s finally happened, thanks to shortwave radio. Broadcasting Board of Governors (B... Read more
Morse Intercom – APP
Features:i) Send Morse to, and receive Morse from, other users of the app. Restrict usage to your WiFi network, or allow full Internet connecti... Read more
Updated Android Digital QST App Now Available
A completely rebuilt digital QST app for the Android platform now is available from publisher Nxtbook Media, which responded to readers’ frustrations... Read more
RFinder – The World Wide Repeater Directory now supports Twitter!
“RFinder has been the ‘Social Repeater Directory’ for a while now with its support of repeater check-in postings to APRS and... Read more
News
Comet CAT-300 Manual Tuner
Introduced at Hamvention for the US market the new Comet CAT-300 tuner will handle 300 watts and covers 160 through 6 meter amateur radio bands. Comet... Read more
iPortable Rack Systems | Ham Radio Rack Mounts
Take your Ham Radio Portable with iPortable. A look at these really cool rack mount units for HF/VHF/UHF Ham Radio. Portable Pro2 Equipment Rack Syste... Read more
The history of communicating with submarines underwater
“Nestled deep in the Chequamegon-Nicolet National Forest in Northwest Wisconsin is the small town of Clam Lake. Clam Lake is best known for the... Read more
K4BEN, announces the official beta of his Remote Radio Service
K4BEN, announces the official beta of his Remote Radio Service, DXRemote.net. It is a very simple concept: his enterprise-class, redundant n... Read more
New at ICOM Hamvention 2022!
ICOM Hamvention 2022! Take your contesting experience to the next level with the latest LDMOS power device with features supporting a SO2R operation i... Read more
