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Restoration of braided flexible cable, circa 1925 (Low Voltage!)

AncientMariner
Managed to locate a pair of circa 1925 Ericsson BBC Headphones suitable for my similar age Ericsson Crystal Radio. The braided flexible cable looks a bit mucky.

I suspect that the inners are tinsel wrapped cotton similar to that used by Post Office Telephones in the days of plaited handset flexibles of the 1940s 50s. I guess there would be rubber overall insulation beneath the braid.


Question is, how to clean the cable up?  Ideas that have so far come to mind are 1) Hand hot water with some washing up liquid, or 2) electrical solvent such as Isopropyl Alcohol. I am a little wary as to be would be kinder to the rubber over insulation (If any) and the tinsel covered cotton?


Either way, or any other way, would be to afterwards jang the wet flex close to a CH radiator to dry out.


Thanks.

Clive

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    davezawadi:

    I am afraid that none of them look at all like the original.




    Strangely, the Twisted Electric Cable covered by Rayon solid colour fabric TM13 Brown "looks" like the lead, which is twisted 2-core, but obviously a totally different  construction and not as flexible. Additionally I would need a "Y" shape.


    Currently the removal of the Bakelite caps off the metalwork is proving a little difficult...  I am currently resisting all temptation to  use a pair of water pump pliers!!!  The liberal application of WD-40 has not made any difference, but has loosened the muck on the diaphragms which can be accessed via the 10mm centre hole.

    Clive

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  • 0

    davezawadi:

    I am afraid that none of them look at all like the original.




    Strangely, the Twisted Electric Cable covered by Rayon solid colour fabric TM13 Brown "looks" like the lead, which is twisted 2-core, but obviously a totally different  construction and not as flexible. Additionally I would need a "Y" shape.


    Currently the removal of the Bakelite caps off the metalwork is proving a little difficult...  I am currently resisting all temptation to  use a pair of water pump pliers!!!  The liberal application of WD-40 has not made any difference, but has loosened the muck on the diaphragms which can be accessed via the 10mm centre hole.

    Clive

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