Roger G3XBM's (Mainly) Amateur Radio Blog

http://mikeyancey.com/73mag/listauthor.php? is a searchable list of articles from the old 73 Magazine . I was pointed to it by Leon Heller ...

Friends, PLEASE, bookmark my main website correctly. Don't bookmark my pages where they are actually located (Google Sites) as these ma...

Testing the ferrite rod antenna on TX this evening (with lots of RF within a metre of me) I'm noticing something I used to get when test...

This evening I fired up the FT817 and the small 15mm diameter ferrite rod tuned with a 365pF air-spaced variable and have been spotted on WS...

Just for fun this morning I tried WSPRing on 7MHz using JUST a ferrite rod wound coil and a 365pF tuning capacitor as a tiny loop antenna si...

Martin G8JNJ has brought to my attention a little known, to me at least, OFCOM concession that appears to allow licence exempt operation un...

Having run WSPR2 now for a couple of days on 137.5kHz, I have still only received reports from 2 different stations, although I have had LOT...

Revised G3XBM main website This week I have been doing some housekeeping on my main website www.g3xbm.co.uk .  At the moment the conten...

Having run the 137.5kHz transverter with WSPR-15 (15 minute on periods) overnight - around 30uW from the earth-electrode antenna - I wasn...

Today I built a breadboard version of my transverter for 137kHz and now I have it running WSPR-2 for the evening. RF power from the IRF640...