Hello Mike
The conclusion is that the Rugby RTTY transmission now has
significant white noise sidebands, extending up the band edges
(perhaps beyond). This ties in with reports I have had from others.
The noise is over 3kHz wide, even with the signal nulled to about S9.
I checked out the sidebands of the growler using spectrogram and they
are symetrical about the centre frequency so there is not much point
in looking for a place at the top of the band.
Peter will be listening for me tomorrow morning when I will be
beaconing between 0700 and 0745UTC.
I will also 'look' for the signal.
I have checked out my transmitting system and it seems to be working
as well as it did a year ago. The lack of success with QSOs on this
band appears to be due to an increase in noise due to a different
'growler' modulation, which appears digital on the spectrogram.
--
Regards, Peter, G3LDO
<[email protected]>
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