Roger G3XBM's (Mainly) Amateur Radio Blog

Jim reports that Stefan's DK7FC 's 8.97kHz test signal is visible at 10dB S/N in Tring UK this morning. He is also visible on other ...

M0BMU   copied my 137.5kHz QRP WSPR signal today giving me -19/-20dB S/N, which is quite a good report. Distance is 69kms. This is now the 7...

Jim Moritz M0BMU has updated his loop/preamp circuit for 8.97kHz turning it into a complete direct conversion receiver for 8.97kHz . He pos...

Jim M0BMU successfully copied signals from DK7FC on 8.97kHz VLF last weekend using a small loop antenna and preamp feeding into a Spectrum ...

Jim M0BMU has produced a neat loop/preamp design suitable for listening on the 9kHz band for which we hope NoVs will be available shortly i...

Some weeks ago Jim Moritz M0BMU made an estimate of my 500kHz ERP based on received signal strength levels at his QTH 69kms away. As I'...

Jim M0BMU was firing up his transmitter on 137kHz today using WSPR. Managed very good reception of his 200mW ERP here at 69kms range. See s...

Chris, G3XVL, in Ipswich has just sent me a screenshot of my 500kHz WSPR signal this morning when I transmitted at 100% for about 30 minutes...

My tiny 500kHz WSPR TX station was heard 69kms away at dawn today with a report from Jim M0BMU who spotted me several times. I also had a ...

After a frustrating evening of not decoding a WOLF signal, I was told how to calibrate my PC's sound card. Then I retried decoding M0BM...

Just tried a PA0RDT designed active antenna (but just used an MPF102 and 2N3904 instead as these devices were to hand) with 1m of wire, la...

Just received my first WSPR signal on 500kHz - from SM6BHZ running 1W erp. Signal first appeared at 1916z and was decoded 6 minutes later....