Hello all,
Thanks to Jim and Mike for their kind answers to my last report. Sri this
week was busy, so I'm still due to reply.
Last night (3rd to 4th of march) I have seen at least three of you around
71.8kHz. Impulsive noise was worse than last week, making copy difficult with
T to M at best. Average noise was around -52dB in 0.4 Hz. "0dB" corresponds
to -66dBm (S9+7dB) at the rx input, but I cant give absolute levels in dBuV/m
as the ant is not calibrated on 73k. Times are in UT, and some files have
been saved on my disk.
21:00.. 71800 -43dB M..T:
cq M0BMU (several times) slight drift -2 Hz
21:28 71818 -41 dB T:
cq G3XTZ (?)
2143..2213 71800/71818 T:
M0BMU - G3XTZ (?) in qso, very difficult hardly copied the contents.
2134..2143 71775 -44dB T:
(unid) someone calling in qrss, sri couldnt make out the call sign.
2232 71820..71817 -37dB 159 in cw
(unid) someone in fast cw, no aural copy, might have been O in qrss...
Had spectrogram running overnight from 2300, recorded some activity (BMU
agn?) around 71800 for another hour or so. The noise stayed up around -52 dB
all night, but went down to -61dB around 0550 with daylight and has stayed
low since. The decca or loran lines, invisible in darkness, came out only in
the lower noise.
After morning coffee, a surprise: amateurs in "near hifi"!
0759 71798 -45dB O:
cq M0BMU k
0803 71786 -46dB O:
G3XDV (there you are Mike, fb!)
Both of them seen cq-ing again and again for a while, MBU still now at 0930.
Signals are nearly the same as in darkness, and the SNR (17dB in .4Hz) is
really nice in the daytime.
I'd love to try a LF crossband-qso on 71.8 / 137.7 kHz. Hope to get the
tx-ant on the air again by 1200 UT today. Please give me about a minute to
switch bands each time.
73s to everybody on 73
Markus, DF6NM in JN59NK
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