Re ERPs. I think mine is mostly right-ish. The antenna is a 7m high Tee with a large top-hat, so its effective height is pretty much the same. At a wavelength of 600m, that gives a radiation re
Hi Rik, This is most interesting. I notice that M0BMU was running with 50mW ERP last night, so it might be worth plugging in his reports as well for last night. My ERP was based on (a) field strength
Hello Roger, path lengths (earth surface): G3XBM: 337km G3ZJO: 411km G4JNT: 420km But I assume that at night time it is ionospheric propagation, where the path loss is mainly determined by attenuatio
Dear Roger, LF Group, I tried sending this earlier, but it does not appear to have got through... Mea Culpa... I seem to have left the WSPR power indicated as 50mW from some 136kHz tests - in fact th
Eddie, Andy, Roger, all, the nice thing about WSPR and the www.wspr.org web site is that a lot af data is available. I copied the my spots (past 7 days) of G4JNT, G3XBM and G3ZJO from the web site an
Nearly 50 years ago, a former RO told me of the day he called an Alaskan coast station on 500 to say he was entering harbour. He was answered by Wellington Harbour Radio. John Rabson F5VLF 58800 Cerv
