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 [email protected] 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
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