-----Original Message-----
From: g3ldo <[email protected]>
To: [email protected] <[email protected]>
Date: 18 January 2001 21:48
Subject: Re: LF: coil screening
Further to Walters e-mail:
Gamal says it all. It was impossible to keep the Decca coils tuned
accurately and maintain phase constancy without the copper screening.
This does not apply to radio amateurs on LF. The Decca requirements are
totally different to what LF radio amateurs need as I have said before. It
seems some have a very slow learning curve!!!!!!!!!!!!!
There is a photo in the Low Frequency Handbook, page 13, that shows the
Decca loading coils and the walls of the ATU building, with Lech, G3KAU;
this gives some idea of the coil and building dimensions.
There were some aluminium boxes around the Decca site containing coils. I
always felt that the boxes were rather large for the size of the coils
inside them - now I know why
Regards,
Peter, G3LDO
<[email protected]>.
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