Roger G3XBM's (Mainly) Amateur Radio Blog

For modes like WSPR, FT8 and similar you may find inspiration in this very simple RX designed many years ago for 10m WSPR. Although direct c...

Rev B 28MHz WSPR receiver Adding more audio decoupling around the oscillator and adding a common base FET RF preamp has totally fixed th...

I rebuilt my 10m WSPR RX today (the rig has to be called Wispy ) onto a tidier, smaller board using MeSquares and took a few steps to reduce...

There is something strange about my Polyakov mixer based direct conversion receiver for 28.1246MHz WSPR at the moment. On the bench, when ...

As the first part of my WSPR transceiver project for 28MHz, I breadboarded a Polyakov harmonic mixer based, crystal controlled, direct conve...

My favourite HF band is 28MHz and I often put my FT817 on and run WSPR in the background whilst getting on with other things in the shack...