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Date: Tue, 14 Jun 2005 16:41:37 +0100
From: "John Rabson" <word.factory@zetnet.co.uk>
To: rsgb_lf_group@blacksheep.org
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Subject: Re[2]: LF: Re: Unwanted LF radiation
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In the 1970s, copper was so expensive that aluminium was used in telephone cables.  Providing a reliable joint between the copper pair and an aluminium one was interesting.

John G3PAI

*********** REPLY SEPARATOR  ***********

On 13/06/2005 at 19:55 G4gvw@aol.com wrote:

>AND to add to it all ! I am not an ex-BT man (but as Alan NYK will attest
> 
>have worked within the system) It is not unknown for strange effects to be
> 
>manifest at points where the copper network changes into other
>manifestations  
>including different metallic elements as conductors and/or transformations
>to or  
>from optical fibre etc.etc.
> 
>Try checking around street cabinets and large "manhole"  covers emblazoned 
>with the logos of telecoms and utility companies (don't  just look at 
>Bravo-Tango).
> 
>As the old maps used to say "there be dragons" !
> 
>Pat g4gvw