Another thought what happens if there is too big an ''underlap'' FET 1 switches off there is nowhere yet for the current to go, so a big back emf spike til the other FET switches on. Laurence KL7L co
Hi Stefan I think it is possible. I was sent a trace on 136kHz a few years back by Peter df3lp (I think) of Lakihegy HGA22 received with an intense lightning storm at about the path mid point. There
Thanks Peter I have been discussing lighning<>.propagation effects with Jim Bacon G3YLA a weather expert, also interested in SpE. I am sure I have your plot somewhere but I have had a few PC changes
Hi Luis that is an interesting observation. It would seem the Dst might have been favourable between the 14th and 16th (-20nT) but I tend to discount Dst on this path. I regard it as a long way from
Jim sadly the answer is not really a ''low noise antenna'' (try a dummy load if you are determined :-)) ) I am afrain the first thing to do is find the source of the noise and try to kill it. The fir
Alex ......you were not blocked here, BUT Yahoo has been behaving very oddly last week .We had multiple copies of posts on some Groups and Messages several months old being distributed on others. Mes
Hello all I am considering transering the Yahoo Group to groups.io. which has none of the problems that yahoo has built into their system and many radio groups have transfered, I am wondering if this
Luis you mention measuring at the end of 30m of coax. Presumably the loading coil is at the antenna?? In which case you need to check that you have not parasitic resonances at harmonics of the drive
Ok Luis I remembered after I posted, that I think Andy's loading coil was indoors fed by short coax run to the wire. So the capacitance of the coax was across the link, or tapped section. Pure water
Hi Roelof, I am not actively following day-by-day reports these days, but I do remember a condition in one of the last Solar minimum where after a long geomagnetically quiet period signals seemed to
Jim I am not aware of a member called pdseng.com, but as I have explained before we have not admin access to the blacksheep group. People can subscribe and unsubscribe. If someone subscribes then cha
well nothing will have changed at blacksheep, so it is either outside or its the delivered message that bounced ?? does it quote the intended recipiant? ....psdeng.com?? Alan -- Original Message -- F
Hi Jay, Brian sold up the family home and plot in Porto (I think there was a fair bit of land) I think for development and moved out with his wife to Affife about 50km north of Porto near the coast.
Hi Antonio One member has left the group and changed his email address. The server is unable to deliver a copy of your posting and issues a bounce message which is normally unseen, This company inter
Please find an article on some tests by the RSGB EMC Committee that may be interesting. This is available on https://rsgb.org/main/technical/emc/emc-publications-and-leaflets/ Alan G3NYK Hi LF Group,
Hi Federico, there could be a number of reasons for your problems. LF/MF does not travel as well in daylight as it does after dark. You are looking at a 1000km + path so you need good skywave. Operat
I think you have be carefull interpreting this paper....the term "LF" would seem to refer to low HF though my German is not good enough to understand it fully. The ionospheric effects at these higher
Forwarded on behalf of Dave Bowman G0MRF -- Hi all. I have been asked to put the RSGB centenary callsign G100RSGB on 472kHz on Friday 21st June. As CW is a little scarce, I'll be on at 3pm and then a
Hi Vern, attachments are accepted on the LF Group reflector but need to be limited to a total message size of around 32kB...maybe it was just too big. Cheers de Alan G3NYK this
