Message-ID: <1999100623191168199@zetnet.co.uk>
Date: Wed, 6 Oct 1999 23:19:11 +0100
To: rsgb_lf_group@blacksheep.org
From: "Peter Dodd" <g3ldo@zetnet.co.uk>
Subject: Re: LF: 73kHz - bad news
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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

<g3ldo@zetnet.co.uk>