Lime away will clean it also . But you have to rinse the wire off to
remove residuals.
~73
Don
KD8NNU
FH#4107
-.- -.. ---.. –. –. ..-
On Sat, Feb 22, 2014 at 5:15 AM, Dave G4GED wrote:
Hi and thanks for reading.
I'm trying to splice a damaged (rodents) RX ant control cable.
It has 7 insulated, stranded copper conductors all inside a PVC
jacket.
Problem is, when stripped of their insulation, 3 (black, brown and
green), of the copper conductors have become coated in a black film?
So to effect jointing and soldering, require cleaning.
I've tried IPA 170 and several contact cleaners but none remove it.
So far, only Emery Cloth will do the job but it's very difficult to
clean each strand without breaking some and therefore weakening the
joint.
All the other 4 conductors are bright clean copper when stripped.
Could anyone tell me why some insulated copper conductors turn black
in this way and whether there's a better way of cleaning it off.
Thanks in advance.
Dave
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