Dear LF Group,
Friday evening, on 73kHz - Called CQ with normal CW and QRSS
between 2000 and 2300 on Friday - couldn't definitely identify any
replies, but there was a steady trace on the Spectrogram screen
for a couple of hours, which I would guess was G2AJV in beacon
mode.
Saturday afternoon and evening - heard many DX signals, 7S6SAJ
very strong of course, 599+, many D's, I5MXX, OH3LYG, and for
the first time, OM2TW (329 - 439). Called several, but no luck.
Congratulations to Christer and Johan on their excellent signal, and
the amount of activity it generated.
Sunday morning - was delighted to work 7S6SAJ for my first QRSS
contact, around 0030. We exchanged 'O' reports. Also saw signals
from G0MRF and I think DJ5BH. Later on, about 0330, saw
7S6SAJ and G3XDV in QSO. I don't have facilities for absolute
signal strength measurements, but I compared the two signals with
an audio mV meter (and no AGC). 'SAJ was 1.5dB down on 'XDV -
Mike is only about 11km away, though!
Re: Rugby 73.4kHz TX - I would just reiterate that I measured the
mains hum on the Rugby TX when it was transmitting an
unmodulated, CW carrier for several minutes during testing on
Tuesday afternoon, so this would be something extra to contribute
to the noise sidebands, in addition to any actual modulation.
Interesting about the two data signals. I'm sure it would be difficult
to make a TX operating in this mode that didn't generate IM
products sufficient to trouble us amateurs, especially if it is just a
refit of an existing transmitter.
Hope to hear 7S6SAJ again soon - at the moment, it certainly is
the best chance of a transatlantic 136kHz QSO.
Cheers, Jim Moritz
73 de M0BMU
|
