Crystal Radio constructed with unusually large passive components with the goal of obtaining an extremely high Q. Variable capacitor from a B-17 Bomber’s antenna tuner 
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After sophistication and deepening, RF direct sampling has gone further. Far away, DXer pursues a faint signal that reaches from the back of the earth through the ionosphere. The success or failure is divided into the influence of blockin... Read more
![Silphase R1 receiver [ VIDEO ]](https://qrznow.com/wp-content/uploads/2020/07/head-img-90x60.png)
![Retevis Ailunce HD1 GPS dual band 2m 70cm DMR [ Review and Teardown ]](https://qrznow.com/wp-content/uploads/2018/09/a9131a_22__1_3-1-90x60.jpg)
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Student from Saint Paul’s School Rajkot receives ISS SSTV
14-year-old Snehal Vagadia VU3WHO successfully received his first Slow Scan TV image from the International Space Station on Sunday, February 10. It w... Read more
Installing Your Ham Radio In Your Vehicle, Tips And Tricks For Mobile
“So I made a video showing a couple options that you can use for installing your ham radio in your vehicle. Every installation will be different... Read more
HF Mobile Antennas by Ham Nation
Gordon West (WB6NOA) talks about HF mobile antennas, and getting the feed-point impedance at 50 Ohms. Also covered, is a recommendation on the type of... Read more
Communications Interoperability Training with Amateur Radio Community Set
Elements of the US Department of Defense (DOD) will conduct a “communications interoperability” training exercise November 4-6, once again simulating... Read more
LogHX – The freeware logger software, designed as complete Ham Radio environment
LogHX able to: Keep a QSO accounting Track and check of e-QSL and paper QSL exchange, via QSL-manager or direct Check preview QSO in run time Use data... Read more
Alfa Radio, Ltd. Appoints Hector Garcia Authorized AlfaSpid USA Service Rep
Edmonton, Alberta & El Centro, California – November 13, 2015 – Alfa Radio, home of the highly regarded AlfaSpid antenna rotator line... Read more
A High Efficiency Extended Length Mobile Antenna
By W5JGV I originally wanted an antenna that would not hit everything overhead while driving, since it was to be installed on a van. I came up with an... Read more
Icom Amateur Radio Festival in Akihabara 2017 – IC -7610
Icom Co., Ltd. will hold a free event “Icom amateur radio festival in Akihabara 2017” at the Akihabara Convention Hall in front of JR Akih... Read more
Chameleon F-Loop TOTAL! Kit and CHA Single Loop
Chameleon F-Loop TOTAL! Kit and CHA Single Loop The CHA F-LOOP 2.0 was designed with portability, ease of use simplicity, ruggedness and high performa... Read more
![SWR Simplified [ ARRL PODCAST ]](https://qrznow.com/wp-content/uploads/2019/03/antenna-analyzer-mfj-225-swr-190x122.jpg)
SWR Simplified [ ARRL PODCAST ]
A discussion of SWR — Standing Wave Ratio — can be complicated, but it really doesn’t need to be. Read more
Historic NSS Call Sign to be Reactivated for First Time in More than 40 Years
Operators from the US Naval Academy Radio Club (W3ADO) and the Potomac Valley Radio Club (W3GRF) will reactivate the historic NSS call sign on May 13-... Read more
RSGB response to PC Pro article by Jon Honeyball, Issue 250, August 2015
A very valid and useful technology by John Gould, G3WKL “We enjoyed Jon Honeyball’s trip down memory lane to when he took his exam 30 years ago... Read more
The Siru Innovatios SDR20 adds new features
New features * Smooth zoom in FFT/waterfall view * Adaptive menu * Frequency memory with snapshot pictures of signals * Sliding effect between views *... Read more
MIT Radio Society, EE and Computer Science Department Hosting Radio Technology Lectures
The Massachusetts Institute of Technology (MIT) Radio Society (W1MX) and the Department of Electrical Engineering and Computer Science (EECS) are host... Read more
D-STAR Picture Messaging, Texting and Mapping, Bluetooth App
Using my ID-5100A in the vehicle, I’ll show you how the app works, group texting and then send a picture back and forth over D-STAR to John KM4M... Read more
