Roger G3XBM's (Mainly) Amateur Radio Blog

This month I had two objectives:    (a) make my 10m halo into a dual band 10m/6m version.    (b) complete my 481THz optical speech transc...

This morning I got a note from Stuart G8CYW which surprised me: "Roger, It has occurred to me that you have joined a "select&...

What I think is multi-hop Es propagation on 10m this evening allowed me a QRP contest exchange with NR4M in Virginia USA on CW at a late 22...

After some debate, the old RSGB LF-reflector is now migrating to a new Yahoo group at http://uk.groups.yahoo.com/group/rsgb_lf_group/ . If ...

The 481THz kit at the G3XBM/P end of the path This evening, thanks to Bernie G4HJW , I managed my first 2-way optical QSO over a path of...

The electronics of the 481THz AM transceiver My first complete optical speech transceiver has been finished and is ready for a line-of-s...

A new beacon, GB3WGI in Ulster, has been approved by OFCOM. When turned on it will radiate at least 100W ERP (possibly much more) in the di...

My AM baseband optical transceiver build is nearly finished (mechanics and electronics both almost complete), although I have to optimise th...

When we got back from seeing our grandchildren in Kent today there was a small package from the RSGB on the doormat. I'd not ordered a...

Bernie G4HJW is well known for his innovative microwave designs as well as many other good projects in recent years. This year he has pro...