“Here’s a brief tour and review of the CR-1a from Commradio. This SDR has excellent build quality and performance. The price is moderately high though. While I’d say this receiver receives signals as well as my Icom R-75, it doesn’t have noise reduction, noise blanker, any kind of IF shift. Still, it’s a great little […] Read more

The SDR-play RSP1 is a powerful wideband fullfeatured SDR which covers all frequencies from 10 kHz up to 2 GHz. All it needs is a PC and an antenna to provide excellent communications receiver functionality. Combined with the power of readily available SDR receiver software (including our own ‘SDRuno’) you can enjoy all modes of […] Read more

Introduction:　 The frequency meter capable of measuring the parameters of the frequency of the continuous carrier signal walkie-talkies , with signal strength indicator. it is the tool of choice for maintenance personnel ,test frequency and signal strength of wireless enthusiasts. This portable frequency counter is designed for counting continuous wave signal comes from Two-way Radio.  […] Read more

Photo: W7RN This is a comprehensive intro to the PSK31 digital mode. It’s all of the major concepts and some demonstration crammed into a 30 minute class. Read more

“Welcome to my exclusive look at the new HAARP two meter antenna designed and built in North Lincolnshire by Phil Simpson M0PXS. Whilst the name is a take on the famous American research facility in Alaska “High Frequency Active Auroral Research Program”, Phil has used it as an Acronym for “Ham Amateur Antenna for Radio […] Read more

About 5 years ago, M2 Antenna Systems introduced a high power solid state amplifier for 6 meters (model 6M-1000) capable of a full kilowatt of output. It was lightweight and small, making it usable both at home and for portable operations. Later they came out with a higher power 2 meter solid state amplifier called the 2M-1K2. I had a chance to review that amplifier and came away with […] Read more

Yaesu FT-450 Reviewed by Rick Lindquist, N1RL ARRL Contributing Editor The FT-450 is Yaesu’s latest entry in the HF/50 MHz transceiver field. It’s a sturdy and competent general-purpose radio in the under $1000 price class. It’s generously endowed with an array of features, a few borrowed from its more vaunted brethren. It is not a […] Read more

A Comparison between the rtl-sdr and sdrplay across different frequencies and settings. Measuring the signal to noise ratio and graphing results.     Read more

KX3 Transceiver Reviewed by Joel R. Hallas, W1ZR QST Technical Editor w1zr@arrl.org The Elecraft KX3 is a nominal 10 W HF and 6 meter transceiver intended primarily for portable use. With its internal battery compartment and available miniature keyer paddles, it is ready to go from a campsite or picnic table with just the addition […] Read more