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Re: LF: Transatlantic Tests

To: [email protected]
Subject: Re: LF: Transatlantic Tests
From: [email protected]
Date: Thu, 27 Apr 2000 13:53:40 EDT
Reply-to: [email protected]
Sender: <[email protected]>
In a message dated 4/27/00 11:27:20 AM GMT Daylight Time, [email protected] 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.

David  G0MRF

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