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Old 5th Jul 2019, 11:34 pm   #17
Oldcodger
Nonode
 
Join Date: Oct 2014
Location: West Midlands, UK.
Posts: 2,181
Default Re: A question about overhead phone-lines.

My formative transmission days were spent deep in a cave in the Scottish highlands. We had a couple of 4MHZ coax systms to various security places in th UK, and systems nding up in places in the states or Canada. The older place had blast doors ,that we shut before going on duty.
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