ADX – An Arduino based HF Digital Modes Transceiver

ADX is an Arduino based Digital Modes Transceiver. ADX is abbreviation for Arduino Digital Xceiver. So where does thing come from?

When QRP labs released QDX Transceiver for Digital Modes I watched with fascination Hans Summers’s Youtube video explaining details of QDX. For me QDX is the perfect optimized Transceiver for digital modes. Inspired by QDX I decided to put together my own! :)

Of course I wasn’t Hans Summers and QRP Labs so no way I had all that programming and RF skills to create something as sophisticated as QDX so I cheated and settled for something super stripped and simple!

I christened it as ADX. It has an Arduino which justifies “A” and it is for digital modes so a “D” and it is a transceiver so it is a “X”! ADX fit that purpose for naming convention quite nicely!

ADX is a mono band (actually quad band) digital modes optimized HF transceiver that can cover four pre-programmed bands one band at a time! More on that later. It can work on 80m, 40m, 30m, 20m, 17m, 15m and 10m bands and also covers four of the most popular digital modes, FT8, FT4, JS8call and WSPR. I thought about using SA612 though this CD2003GP IC gave much better sensitivity results as it has a RF preamplifier section and it is dirt cheap and readily available from every online Chinese marketing site!