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GPO COAXIAL UNDERGROUND CABLE, 1960's
Example of underground coaxial cable on display stand. The inner conductor is air spaced for better performance, air is one of the best insulators. The conductor is held in the centre by nylon discs. For an explanation of coaxial Telephone cables see Item A0574 above.
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- As a Technical Officer back in 1969, I maintained three valve operated line systems that used coax cables. All made by ST&C they were the CEL6A, 8A and 12A. The BM/A-OF"A",BM/A-OF"B" and the BM/A-L"F". The centre copper conductor of the coax cable carried 1000V ac with the line systems reverse power fed at distances of approx 30 miles
.......... Henry Street, Banbury, 30th of October 2011