![K3LR Loop Flyby [ HD Video ] – Contest Station](https://qrznow.com/wp-content/uploads/2016/08/k3lr.jpg)
Video from August 5, 2016
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An Excellent Dual Band Yagi for 50/70MHz with 1.2m boom Model: DB-664 A dualband balun is recommended for this antenna, details can be found HERE The 4-6-6 Dual Band Yagi has a total of 6 elements, 3 elements are used on 70MHz while 3 eleme... Read more
Let’s take a look a this mini-mobile and compact GMRS Mobile Radio from Radioddity. Rated at 20-watts, let’s test the power output and see what the menus show. Plug-and-Play GMRS Mobile Radio: Easy to install the DB20-G with the cigarette power plug in your vehicle. All control buttons, speaker, microphone integrated into one handset, which made […] Read more
WSJT-X version 2.5.1 releasedThe development team have announced the General Availability (GA) release of WSJT-X version 2.5.1. This release mainly contains improvements and defect repairs related to Q65 and JT65 modes when used with non-standard and compound calls. Also included is a new feature for microwave aircraft scatter, and repairs for defects detected since the […] Read more
Curt, KB9JQU, has a newer question around the topic of grounding. He is wondering how are you to ground when you are doing portable operations? Read more
We look at the latest firmware update and also at the upcoming accessories. GENERAL FEATURES – Splash proof & Dustproof Portable SDR 160-6-meter ham bands; General ‘receive’ coverage 0.5 – 56.0MHz; All modes: SSB, CW, DIG, AM, FM; High-performance 32-bit floating-point DSP; Current drain as low as 100 mA in ‘receive’ mode (backlight on, preamp […] Read more
You asked for it, here it is: a live A/B test of the Wolf River Coil vs the Chameleon CHA-LEFS End Fed Half Wave antenna. Which will win in this Parks on the Air activation of Brunet Island State Park in northwest Wisconsin (POTA K-1442). This is not a scientific test and is for demonstration […] Read more
The LoRa Meshtastic T-BEAM device are small battery powered devices that will mesh with other T-BEAM and send messages and other data from your phones, tablets and computers. Read more
Jared, N0SPC, is the only ham in his country, and he has a question regarding phasing. He wants to know if he can use a phased array of mobile whips to get directivity? Yes and here is how… Read more
Dave, W9GR explains what is CESSB – Controlled Envelope SSB and how it gives your more RF Talk power. Read more
The new Youth category for the CQ World Wide DX Contest will debut October 30 – 31 with the phone weekend. The category covers contesters age 25 years old or younger and applies to both the phone and CW weekends (CW, November 27 – 28). International Amateur Radio Union (IARU) Region 2 (the Americas) is one of […] Read more
The Chameleon CHA-MPAS 2.0 just might be the best portable Ham Radio antenna that you can get today, due to its versatile configurations and compact size. Take a look at this video and let me know what you think about this great Ham Radio antenna. The Modular Portable Antenna System (MPAS 2.0) is a concept allowing […] Read more
KrakenSDR is now available for crowdfunding on Crowd Supply. Thank you to all interested parties for your patience while we navigated recent pandemic-related delays. KrakenSDR is a five-channel, RX-only software-defined radio (SDR) based on the RTL-SDR and designed for phase-coherent applications and experiments. Phase-coherent SDR opens the door to some very interesting applications, including radio […] Read more
PHOTO:K2BSA Scouting’s largest event in the world — Jamboree-on-the-Air (JOTA) — takes place October 15 – 17. During JOTA, Scouts and hams around the world, around the nation, and in your own community meet on the air via amateur radio. Scouts of any age and sex may participate, from Cub Scouts to Boy Scouts and […] Read more
Ziteng (Andy) Wang is a PhD student at the University of Sydney. He recently discovered an unusual radio signal coming from the direction of the Milky Way’s center. The radio waves Andy discovered using the ASKAP radio telescope in Western Australia don’t fit any currently understood pattern of variable radio source and could suggest a […] Read more
The HobbyPCB RS-UV3A radio module is a 144/220/450 MHz FM transceiver board. The RS-UV3A is a low cost transceiver solution for Packet Radio, repeaters, Echolink stations, base station and mobile applications. The RS-UV3A supports multiple interfaces including microphone/speaker, line level audio (soundcard), TTL serial control, Arduino Shield connections and USB. The RS-UV3A provides conditioned power […] Read more
![Real-time Radio Spectrum Map Database Demo [ Android App ]](https://qrznow.com/wp-content/uploads/2021/10/maxresdefault-3-1-610x380.jpg)
In view of the escalating demand for higher mobile data (from IoT, industry 4.0 applications), there is a growing world-wide interest to improve the radio spectrum utilization. Effective management of the wireless spectrum requires knowledge of the available bandwidth at any given time and location, which necessitates expensive recording equipment and labour cost at various […] Read more
Today I take the XPA125 Tuner and put it through its paces with a 9:1 EFRW Random Wire Antenna Read more