isw wrote:

In article ,
"N_Cook" wrote:

isw wrote in message
]...
I have a piece of gear that uses a "cable" consisting of printed
circuit traces laminated between two pieces of dark orange plastic
(Kynar???). The cable was torn in two, and I need to repair it. If I
could remove about an eighth of an inch of the insulation on one side
of each end, I could lap them and solder the conductors. The plastic it
totally resistant to every solvent I have on hand, and a 750F soldering
iron has no effect.

Does anybody know of a solvent for the plastic, or some other way to
strip the traces?

Isaac

A small cylindrical centrided burr in a dremmel can be useful for
stripping back, surprisingly controllable if you hold it the "right" way
round so it doesn't skud.

Or make up some fine wire plaited braid to replace the whole thing

It's in the lens assembly of a small camera. The cable is less than 0.25
cm wide, and has twelve conductors (I had to use a loupe to count them).
Making a replacement is probably not in the cards.

Isaac

I have seen these replaced by insulated winding wire, e.g. from a relay coil
(maybe 0.002 inch or 50 micron wire). On the other hand I would not do
this for a customer since it may not be reliable in the long term. It
might be worthwhile for fixing you own stuff, however.
Chris