From: G0MRF@aol.com
Message-ID: <de.42efd4b.2639d8a4@aol.com>
Date: Thu, 27 Apr 2000 13:53:40 EDT
Subject: Re: LF: Transatlantic Tests
To: rsgb_lf_group@blacksheep.org
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In a message dated 4/27/00 11:27:20 AM GMT Daylight Time, 
j.r.moritz@herts.ac.uk writes:

<< Another motive for raising this is on the grounds of complexity; like 
 several others, I don't have synthesised equipment, and building 
 fully featured synthesizers in my spare time is definitely a long term 
 goal. But I could come up with pretty good stability equipment with 
 the help of a couple of crystals, if I knew what frequency they 
 should be.
 
 With this in mind, it would be helpful if the Transatlantic II people 
 could let us know of their intentions as soon as possible.
  >>

Hi Jim / group.

The frequencies will probably depend on local receiving conditions on both 
sides. It's quite likely that 'split' operation is best, after all, it will 
not matter to us if we are required to transmit on a Loran line from Lessay - 
Just as long as we don't have to listen on one!
I've built a few twin crystal VXO's recently.-Based on an idea by Peter G3LDO.
These are fairly stable but could be improved by using the clip-on crystal 
heaters as suggested by Andy G4JNT.  Coverage is no problem. Even with a 
divide by two stage they still cover 70% of the band.  You just have to 
calibrate them against a frequency standard. e.g. 60k and gram.

73


David  G0MRF