Roger G3XBM's (Mainly) Amateur Radio Blog

Strange how one forgets things. My very first MF QSO, on 500kHz some years ago, was keying the antenna lead of my small AF/LF/MF generator...

This evening the 500kHz band is being withdrawn from UK amateurs at midnight, as it is in most other countries too, to be replaced by the 47...

Back in the late 1940s G5UM and others recorded the last few hours of operation on the old 56MHz (5m) band on an old 78rpm disc. Sadly this...

With just a few days left before the 500kHz permits are withdrawn for ever I've been doing a last gasp bit of WSPR beaconing. It is not ...

OFCOM has announced some intended changes to the Notice of Variations issued to some radio amateurs in the UK. See http://licensing.ofcom.or...

Well, the JT9-1 test QSO with G3ZJO was a total success and completed in around 10 minutes this evening. Later, I called CQ on JT9-1 and go...

G3ZJO and I have reported each other's 500kHz WSPR signals and each managed to get reports from close on 1800km away but, despite being...

After the usual reports from all over the place on my 50mW ERP 500kHz WSPR I took a listen around for some CW stations this evening. G3XIZ w...

Just got this nice email from John WA3ETD/WG2XKA who has successfully built another copy of my 472/500kHz transverter. "Hi Roger, I ...

My last post with this title got corrupted when I tried to edit it, so this is a shortened revised version. 500kHz WSPR this evening has bee...

MF WSPR activity this evening This evening the 472 and 500kHz bands are humming with WSPR signals and those monitoring for them. At th...

Conditions on HF appear to be very disturbed (according to the propagation forecasts) yet I'm getting plenty of WSPR spots on 500kHz. It...

G6AVK has his temporary grabber running on 500kHz this evening. See http://www.qsl.net/g6avk/ . It was interesting to see what my WSPR sig...

Over the last few days Eddie G3ZJO has been building a near carbon copy of my 10W transverter for 472/500kHz. I am pleased to hear that the...

The attached table shows the different stations that have reported my 500kHz WSPR in the last 5 days. In summary, 19 different stations in 8...

Paul-Henrik, OH1LSQ has kindly send me his screenshot showing my WSPR signal as received in Finland. It shows a visible, if weak, trace on ...

DX reports on 500kHz WSPR this evening using the new 10W transverter My new 500kHz transverter has "done the business" with re...

This map shows people who have copied my 500kHz WSPR signal (using the new transverter) up to 11.20pm tonight. Best DX report so far is DL4...

Today I completed the rev E version of my 10W transverter. In the end I reverted to a double balanced mixer and this immediately solved my...

This afternoon, after a break of a few weeks, I went back to my 10W 472kHz transverter design. The intention was to simply build a second sa...