Dear LF Group, Thanks for the reports and images for the previous 2 nights tests - if nothing else, it confirms 136k is much easier than 73k! I saw nothing from ZL6QH this morning; will try again thi
Dear LF Group, Transmitted last night from 2220 until 0645 on 135.923kHz. Also saw slow-ish CW from G3KEV and G3JKV's QRP beacon, both a few Hz above my frequency. Apart from amateur signals, I heard
Dear LF Group, Thanks for the reports on the 73k Beacon last night. It would appear that Laurie's extra few dB of ERP makes all the difference, and also that QSB is something of a limiting factor wit
Dear LF Group, Will be operating the 72.4018kHz beacon with 120s dots again tonight from about 2230 onwards. It seems the E-mail I sent yesterday on the same subject did not get out until this mornin
Dear LF Group, I don't know about the SPM-12, but I have the SPM-6 and SPM-19, both of which use a 10kHz final IF, available at a socket on the rear. The little SPM3 has a different arrangement with
Dear LF Group, Have just got back from my weekend trip - thanks for the reports for the 73kHz beacon from Friday night. I will be running the beacon again on 72.4018kHz, QRSS120, again tonight from a
Dear LF Group, Have fixed my antenna for the time being, so will run the beacon again on 72.4018kHz, 120s dots, hopefully from about 2230 onwards. I will be away for the rest of the weekend, so will
Dear LF Group, I think we have been here before ... If you chose the optimum resolution for the speed of QRSS you are using, you will get the best signal to noise ratio between "dot" and "no dot" whe
Dear LF Group, Transmitted on 72.4018kHz last night from around 2250 until some time around 0200, when part of my temporary antenna fell down. I doubt if I will have time to fix it before tomorrow, s
Dear LF Group, I recorded spectrograms around 137.79kHz, between about 1500 and 1900 on 1st December, but no identifiable signals. The part of spectrum ZL6QH was operating in seems pretty clear here
Dear LF Group, Since conditions might be improving, I will try running the 73kHz beacon again tonight, from around 2300utc onwards. Will be sending QRSS120 on 72.4018kHz again. Cheers, Jim Moritz 73
Dear LF Group, I recorded spectrograms around 137.790kHz last night through this morning, hoping to catch ZL6QH and VA3LK - nothing seen, however. I was using 2 receivers, one connected to the loop a
Dear Andy, LF Group, Thanks for writing about this very interesting project - At 15:17 28/01/2002 +0000, you wrote: The effect is to keep the VCXO precisely locked in the long term to the GPS signal,
Dear LF Group, I have just had to replace a couple of the pass transistors in the Farnell H60/25 PSU that I normally run my LF TX from. They are TO3 NPN devices marked "TE1912", with Motorola brandin
73 Alberto I2PHD Dear Alberto, LF Group, "Totem pole" = 2 transistors in series with the top one connected to +ve supply rail, the bottom transistor connected to the -ve rail, and the output taken fr
At 09:14 29/01/2002 -0500, you wrote: Hello, I have not experimented in a while with my partially built tesla coil, but has anyone used their Tesla coil as an antenna for ELF or other Freqs? If we tr
At 14:12 29/01/2002 +0100, Johan wrote: ...Perhaps I am missing something, but as far as I can see, the waveform *will* be symmetrical if the drive to each totem pole has a 50/50 duty cycle and the m
Dear LF Group, Many thanks to DL4YHF for the speedy software update; I hope to do some tests on PSK31 some time in the next few days. About using BPSK modulation with the Decca TX:- The phase keying
Dear Alberto, LF group, By the time my "guests" had gone and I had fixed the antenna, it was 1545 on Sunday afternoon - I transmitted a Jason92 signal from then until about 1815 on 137.500kHz, but I
