Antenna
How High Should a Dipole Be? A Look at Antenna Modeling
“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 rul... Read more
All-Band 80-10 Meter End-Fed Half-wave Antennas – MFJ 1982,1984
Cover all HF bands with one single wire and no tuner! to ensure great performance in a wide range of operating conditions. End-fed horizontal wire, an... 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
Emergency Antenna Platform System (E-APS) – WC2FD
A system to facilitate emergency radio communications from parking lots using lamp posts as antenna masts. Designed and built by the kids of th... Read more
![Super Versa Xseries Antenna [ Japan ] 11 and 8 elemets HF Antenna](https://qrznow.com/wp-content/uploads/2016/11/408xmain-265x168.jpg)
Super Versa Xseries Antenna [ Japan ] 11 and 8 elemets HF Antenna
Type number KA1-211X KA1-408X KA1-411X Gain table / size Frequency (MHz) 14-50 7-50 7-50 The total number of elements 11 Elements 8 Elements 11 Elemen... Read more
Review
![SMΩRF RF Vector Power Meter by microHAM [ Video ]](https://qrznow.com/wp-content/uploads/2016/12/l_img_smorf_0038-265x168.jpg)
SMΩRF RF Vector Power Meter by microHAM [ Video ]
SMΩRF™ is the vector power meter. Connects to the power RF signal by remote sensor, available in several models for power levels up to 12KW and freque... Read more
Overview of the Icom IC-9700 SDR VHF/UHF Transceiver
Following on from our initial ‘Introduction to the IC-9700 VHF/UHF/1200 MHz Base Station SDR Transceiver’ video, we have put together a more in-depth,... Read more
Using the MFJ-1788 Mag Loop Antenna Horizontally
“I test the MFJ-1788 in a horizontal position on my rooftop. The performance is great on 20m. I used an MFJ Cobweb antenna as the comparison ant... Read more
Equipment
![Commradio CR-1a Receiver [ Video ]](https://qrznow.com/wp-content/uploads/2019/06/514572dc3c9d4dc202a2b97334170b1e-265x168.jpeg)
5W CW Transceiver kit assembly instructions – QRP Labs
Easy to build, single-board design, 10 x 8cm, all are controls board-mounted Professional quality double-sided, through-hole plated, silk-screen print... Read more
NEW RTL-SDR DONGLES WITH METAL CASE AVAILABLE IN OUR STORE
Currently we at RTL-SDR.com are selling upgraded RTL-SDR dongles on our store. We’ve worked hard to reduce the most common issues that the cheapest ge... Read more
EXTRAFLEX BURY /.400″ – Low loss Coax Cable
EXTRAFLEX BURY /.400″ [10,3 mm / 0,405 inches Cable] WHY CHOOSE THIS CABLE: – The only 10,3mm coax that can be use bo... Read more
DC9DZ: Project Tsunami 40K – Power Amplifier (PA) using 4CX15000AA
Data of DRESSLER Tsunami-40K RF Linear Amplifier Frequency bands all HF amateur bands 1.8 MHz to 29.7 MHz Power supply 3 power supply transformers 200... Read more
News
HF Station Grounding and Microcontroller Projects are Next ARRL Webinar Topics
Two well-known ham radio authors and speakers will share their expertise with members in October during ARRL Learning Network webinars. ARRL... Read more
Slow-Scan Television Transmissions from ISS Planned – September 30
A Moscow Aviation Institute MAI-75 slow-scan television (SSTV) experiment event is planned for Wednesday, September 30, from 1305 UTC to 1845 UTC, and... Read more
Former Dayton Hamvention Venue Hara Arena is Being Demolished
Hara Arena, the former venue for Dayton Hamvention® and myriad sports, entertainment, and other presentations over the years, will soon be histor... Read more
Chinese Amateur Radio Satellite Launches Delayed
CAMSAT says the CAS-7A launch has been postponed until next May, and CAS-5A until next June. “Because of COVID-19, many things have been delayed,” CAM... Read more
New WSJT candidate release features FST4
Candidate releases are intended for beta testers, WSJT-X 2.3.0-rc1 offers the new modes FST4 and FST4W designed for use on the LF and MF bands WSJT-X... Read more
