Hello Markus, Thanks for the report. I have just noticed a change in gate waveform, last time I saw this it was shortly followed by a dead FET.... Still, not had to renew any for a long time. Not lik
Hello Stefan, Listening LF now until later in the evening, should upload spots to WSPR site. Good luck! -- Best regards, Chris mailto:[email protected]
Hello Stefan, both my spots of your sig were in good daylight, well before dusk. Now I see nothing from you. Maybe your electrons are frightened of the dark? ;) Are running overnight and into tomorro
Hello Paul, Commercial or home brew? Will you be able and willing to post details of it at some point? Thanks. -- Best regards, Chris mailto:[email protected]
Hello LF'ers RX protection sought for either a Kenwood TS-590 or a Red Pitaya functioning as an SDR for the LF 136kHz band. Change over relay box for the antenna has a 60 Amp automotive relay groundi
Hello N1BUG, I certainly look forward to trying! I asked this question on a couple of forums is it something you would have looked into paul? With devices like this, (linked to below), limited to a m
Hello Paul I am not sure I did get a current clamp scope capture. If I *DO* lose a FET it's nearly always when running OPERA with the constant stopping and starting, or so it seems. Only lost three i
Hello Paul, Yes I use the still available 32N20 devices, but so long as you watch the input capacitance you should be able to substitute quite a few others. I was given a load of these, which are kin
Hello Andy, Could this in any way supply a reason for me seeing the odd dead FET when running OPERA and never when running WSPR? I always had the feeling that the fact OPERA stops and starts so many
Hello Rik, I knew someone who had one of the amazing Icom 781's and although he no longer has it believes this wide band mod may allow TX down there. As it is apparently just cutting a leg on a throu
Hello LF'ers, Hi, bit of an oddball problem here (again.... ;)) I have a 1kW Class D low frequency 137 kHz LF ham band amp I built. It has worked fine for many months. I like experimenting / learning
Hello David, Thanks for the reply. I will try this I take it you just tie Input A and Input B together and feed it a x2 signal with X2 tone spacing if using WSPR? I am pretty sure there's either harm
Hello DK7FC, The biggest voltage and current spikes in my W1VD Class d amp are when a WSPR or OPERA transmission ceases, from back EMF I presume. I am curious as tvo whether a "soft voltage start" ci
Hello Stefan, I do sometimes wonder how many meters of copper wire you coil up in a given year, you must be a wire salesman's dream customer :) -- Best regards, Chris mailto:[email protected]
Hello LF'ers. Hi, I run a fairly odd set up. TS-590 in split mode, TX'ing at 272 kHz from the DRIVE socket into a 1kW amp which by design halves the frequency. I use the X2 function in WSJT-X to give
Hello LF'ers Running 126kHz RX on WSPR2 and WSPR15 but on a none resonated antenna and with the old TS-590 so reports may be well down on normal. Just sayin'..... :) Been playing on Top Band and not
