A new graphing tool has been developed by Jim, G3YLA of the Propagation Studies Committee to show the near real-time critical frequency over the UK and the predicted maximum usable frequency over different paths.
A feature on how to use the free tool appears in the July issue of RadCom.
But if you want to try the critical frequency tool on your own it can be found at www.convectiveweather.co.uk/ionosphere and there are useful help files to get you going.
Source:RSGB
News
For over 100 years amateur radio and ARRL — the National Association for Amateur Radio® — have stood for the development of the science and art of communications, public service, and the enhancement of international goodwill. Amateur Radio’... Read more
![FCC Warns Amateur Radio Operators To Not Commit Crimes [ VIDEO]](https://qrznow.com/wp-content/uploads/2020/12/FCC-seal-2020_5-90x60.jpg)
VHF
Virgin Orbit’s LauncherOne is a go for launch on Wednesday, January 13, at 1500 UTC, carrying the AMSAT/Vanderbilt RadFXSat-2/Fox-1E CubeSat into space. The LauncherOne vehicle will carry 10 other satellites. RadFXSat-2/Fox-1E carries an in... Read more
Equipment
Icom AH-705 Announced on Christmas
AH-705 HF/50 MHz Automatic Antenna Tuner Features Covers the 1.8 MHz to 50 MHz bands, using a long wire element 2-way power sources using alkaline bat... Read more
mAT-705 Tuner Introduction
mAT-705 Tuner Introduction The MAT-705 is a very small and powerful tuner for portable shortwave devices, especially designed for the Icom IC-705. The... Read more
THE NEW MOUNTAIN TOPPER MTR-4B V2 BY LNR PRECISION
MTR-4B V2 Photos COMING SOON “The Mountain Topper” The LnR Precision MTR transceivers are designed to be efficient portable CW rigs. Whether climbing... Read more
NanoVNA SAA2 Version 2 Vector Network Analyzer – Ham Radio Antenna Analyzer
NanoVNA SAA2 Version 2 Vector Network Analyzer – Ham Radio Antenna Analyzer Read more
Introducing QCX-mini 5W CW transceiver!
The miniature version of our popular QCX 5W CW transceiver, with special portable-friendly features for SOTA and other portable operators: – Sma... Read more
New RFinder B1, Advanced VHF/UHF 4 Watt DMR/Analog Ham Radio Smartphone, NO CODE PLUGS NEEDED!!
“My switch back from iPhone to RFinder happened in this video. A dual band VHF/UHF radio with a newly designed receiver for better sensitivity,... Read more
Connecting the MX-P50 amplifier and LDG Z11 pro tuner to the IC-705
Connecting the MX-P50 amplifier and LDG Z11 pro tuner to the IC-705. Read more
Airspy HF+ Discovery is the Most Refined HF/VHF SDR
The Airspy HF+ Discovery sets a new standard in terms of reception performance with extra pre-selectors for all the supported bands and a New DSP Core... Read more
Newly released pictures of the new FTDX10 SDR
Newly released pictures of the new FTDX10 SDR Read more
ICOM IC-705 Antenna Mounting Bracket & Patch lead
NEVADA RC-105 A beautifully made bracket, complete with, BNC to SMA patch lead and mounting mounting screw, for connecting a PL-259 style portable ant... Read more