Dear LF Group, I was able to get reasonable field strength measurements of the two 73k beacons last night G3AQC -93dBuV/m, 22uV/m G3LDO -95dBuV/m, 18uV/m Don't have distance info to hand, but if you
Dear LF Group, I would like to try for a T/A signal on 73k, but am somewhat handicapped at the moment because I don't have the cherry picker I have been using to hold my antenna up. The temporary mas
Dear John, Laurie, LF group, Congratulations on this new Transatlantic crossing - looks like your perseverance has finally paid off! Cheers, Jim Moritz 73 de M0BMU
Dear Peter, LF Group, This is one of the well-known techniques for measuring Q; as Rik pointed out, the important thing is to minimise coupling between generator and detector and the tuned circuit un
Dear Mal, LF Group, ...What method and where in the system is the RF being measured, ie top of coil, cold end of coil, at the tx output etc... It seems to be conventional to measure RF current at the
Dear LF Group, Well, it works for radio astronomers and early warning radars, so why not on LF? Here are a few comments: The basic idea seems to be to coherently add together receiver outputs from di
Dear LF Group, Thanks for the reports on my signals for the weekend transatlantic test. I transmitted QRSS with 5s dots on 135.9250kHz (to avoid G0MRF's QRG), between about 2310 and 0350 utc. The QRN
Dear LF group, I find myself without a decent "transatlantic" antenna at the moment, due to someone having borrowed my cherry picker. However, I will try to put something together for the night of 10
Dear LF group, I left my PC running last night to record the spectrum of the signal on 136.0kHz. The attached image obtained using Spectrum Lab shows a few hours from early this morning, which is rep
Dear LF group, I too can hear this - it has always been there since I started on LF, and does sound like very weak CW, but is never readable. I can hear it at any time the noise level is fairly low,
Dear Andy, LF group, Your beacon signal was "O" copy here last night, and the message was decoded without difficulty. I am currently putting together a "7FSK" generator here based on a VCXO to drive
Dear Andy, LF group, How about 7FSK? you could then extend it to specify dot periods, like 7FSK60 or whatever. Or would that be too boring? Cheers, Jim Moritz 73 de M0BMU
Dear LF Group, My workplace (where my E-mail facilities are located) closes down from tomorrow (Friday) afternoon until 2nd January. I hope to be QRV on LF at odd times over Christmas,so hope to see
Dear LF Group, My workplace (where my E-mail facilities are located) closes down from tomorrow (Friday) afternoon until 2nd January. I hope to be QRV on LF at odd times over Christmas,so hope to see
Dear LF Group, My workplace (where my E-mail facilities are located) closes down from tomorrow (Friday) afternoon until 2nd January. I hope to be QRV on LF at odd times over Christmas,so hope to see
At 19:19 17/12/2001 -0500, you wrote: Hi Jim I am planning my transmitting station . Could you send me details of your ant? Is it end Fed/ Is it a vertical? What is ground system I could set up a lon
At 12:42 18/12/2001 +0100, you wrote: Hello James and the group, what you all think about the best method of generating multiple, sequential frequencies from an LF transmitter? It depends what your s
...Since we now have shown that is technical possible to copy our signals over 10000km and more the time might be right to develop a mode that will allow us to make QSO's over these distances. 73, Ri
Dear LF Group, Was very pleased on arriving at work this morning to see that W1TAG and W4DEX had been able to copy my 73k beacon on Saturday night - and also a bit relieved, since my temporary mast t
