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Old 16th Feb 2020, 12:15 am   #12
Join Date: Jan 2012
Location: Brentwood, Essex, UK.
Posts: 3,518
Default Re: 1950's Speaker Connection Plug

Tinning was necessary with the old rubber-insulated wires because the sulphur that was present in the rubber would attack bare copper. Tinning continued to be used when plastic first replaced rubber. Presumably its general use ceased once it was realised that modern plastics such as PVC do not attack bare copper.

Last edited by emeritus; 16th Feb 2020 at 12:20 am.
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