Message-ID: <3C0833FB.AD0586B3@att.net>
Date: Fri, 30 Nov 2001 20:35:55 -0500
From: "Dexter McIntyre W4DEX" <dmcintyre@att.net>
Organization: JDM Communications
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To: rsgb_lf_group@blacksheep.org
Subject: Re: LF: Re: Re: 75 kHz HBG +50db above noise in NC
References: <3C0813D6.28D093B3@att.net> <002501c179fb$f8965b00$0400000a@parissn2> <001d01c17a00$82cf58e0$0300a8c0@charter.net>
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John,  The 75 Hz RTTY centered on 73.6 kHz is not a continuous
transmission.  I have heard it every day this week around 2200 UT.  It
produces a reading of -30 dbm on my selective level meter (tuned loop
with preamp) when the normal noise level reads -75 dbm.  

My assumption that the signal originates from CFH came from this page:

http://www.provcomm.net/pages/joe/introvlf.htm#Target

If you do not hear it strong we need to find another possible source.

Stewart, I have a .wav file of the 73.6 kHz signal.  It's one minuet
long and is close to 1 mb.  Will send it to you if you would like to
analyze it.

Dexter

John Andrews wrote:
> 
> Stewart,
> 
> > Also, is the following about the FSK signals correct?
> > On about 73.6 kHz is CFH (75 Hz shift and 75 BPS)
> > and on about 73.3 kHz is Rugby (100 Hz shift and 100 BPS).
> 
> I have only seen listings in The Lowdown for CFH being on 73.6. They
> certainly haven't been there in the last week, as the signal would be
> overpowering here in Massachusetts.
> 
> The center frequency for Rugby is 73.25 as seen here, and the signal is
> exactly 100 Hz wide. It is a few dB stronger here tonight than it was at
> this UTC time on Tuesday.
> 
> John Andrews, W1TAG