Shortened version of the popular tri-band end fed antenna. In order to keep the wire length relatively short a small 35 µH coil is placed towards the end of the antenna. The transformer is wound on the FT140-43 toroid with the 7:1 ratio giving the impedance reduction of 49:1. With careful tuning the antenna resonates…

This my homebrew duplex hotspot running on Pi-Star software. The main components are the Raspberry Pi Zero, MMDVM HS Duplex Hat, 2.4″ Nextion Touch Screen display and a 12V to 5V step down voltage converter. Everything is enclosed in a small plastic box found on eBay. The hotspot can be powered by either a regular…

M0TCX I got my full license on the 1st April 2009 and a little over a month later, on the 8th May, I got my M0TCX callsign. That was the final step in the three tier ham radio licensing process in the UK. ​My other UK callsigns include: M6CTU (Foundation License) obtained in May 2008…