Message-ID: <006a01bfaf86$7ccb9b20$0a00a8c0@server1.ThreeLakes.ca>
From: "Larry Kayser" <kayser@sympatico.ca>
To: rsgb_lf_group@blacksheep.org
Subject: LF: Re: Transatlantic  beacon tests
Date: Wed, 26 Apr 2000 09:51:04 -0400
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Gentlemen:

>Transatlantic test beacons need to be very stable so that the listeners
>over there that have the equipment can use very narrow bandwidths.
>Spectran may be popular but it will only go down to 0.03 Hz and other
>listeners over there do have other DSP equipment that can do a lot
>better.


The notion of excellent transmitter frequency stability is critical, but so
also is the necessity of having fully automated receiving systems to take
advantage of the fully automated transmitting systems!

I offer that the only long term fully automated receiving software system
available today is that of VE2IQ, Bill de Carle, who has made his C - BPSK
system work over long distances using the GRAB feature.  From my perspective
a season long experiment will require just as much automation and detail
work in the receiver as it will for the transmitter.  What is needed is a
suitable very narrow bandwidth receiver design to go with the DDS effort we
are making over here with the AD9835 DDS device.

I am also prepared to share in the Transmitter effort with alternate nights
from this side with a 240 ft high tower with a partial umbrella antenna on
it.  My Sulzer Labs standard at the transmitter will easily keep 2 parts in
10 -10th.  A reliable large final amplifier is critical to this effort, one
that does not need any baby sitting and can be left running for weeks on end
in a dark, cool transmitter building.

Larry
VA3LK