I recently received back my Expert 1.3K-FA linear back from its holiday in Italy. I noticed some months ago that it would sometimes fail to start and require repeated presses of the power button. After a short holiday in Italy, the manufacturer replaced two relays, and I thought WPX RTTY was a good baptism of […]
Multi Mode Digital Voice Modem with HAT
Let’s start with the name, MMDVM (Multi-Mode Digital Voice Modem) with HAT(Hardware Attached on Top) The HAT has been designed by Flo DF2ET and Mathis DB9MAT and is compatible with the Raspberry PI or PI W Zero. The board will support MMDVM so that’s DSTAR, DMR, P25 and Fusion using the excellent software by Jonathan G4KLX. The Raspberry Pi zero W (WiFi) The board […]
Receiving HF Weather Fax
If you have spent time listening to HF you may have noticed the distinctive sound of HF Fax, something I thought had disappeared 20 years ago. FAX seems like a very old technology now, although before the days of email the FAX machine was the only way to send near real-time images between people. HF Fax uses […]
6E beam for 70 MHz
70 MHz has become increasingly popular since Icom added it to some of their new transceivers. Since owning an Icom 7100 and Icom 7300 and enjoying the UKAC and portable events I decided to make a beam for the band. I had some aluminum from a previous order at aluminum warehouse, and so decided to look […]
MF WSPR Reception
Following on from the previous post, WSPR reception continues mostly 24×7 with a focus on MF. As previously described the setup has been operating for a couple of weeks now, and its a good time to review the WSPR spots. Best DX Spotted 472 KHz Call Grid Pwr km az WA4SZE EM65 0.2 6826 45 […]
WSPR Reception 24×7
WSPR reception 24×7 has always been something I have wanted to try. The problem is trying to find a transceiver, computer, antenna combination that will allow this with minimum fuss. 472 KHz Reception Computer You won’t need a very high spec computer, but if you are leaving it on 24×7 low noise and power […]