[sdiy] Semi-OT: conductive glue?

[John Speth]

At work here, we use "silver epoxy".  At least that's what we call it.  I
don't know the brand name or any other details except that I've been told it
conducts and can be worked just like epoxy.

John Speth
mailto:johns at molectron.com 

> I'm trying to repair a piezo pickup for a violin. For each string, 
> there are two small (about 3mm * 3mm) piezo slices between two pieces 
> of brass. One brass piece is pressed down by the string while the 
> other brass piece is mounted into the bridge. The string 
> itself is the 
> ground connection for the piezo pickup.
> 
> Normally this combo is fixed together, the brass glued or whatever to 
> the piezo, but now one of the "upper" brass pieces (the one 
> the string 
> rests on) has come off. Any idea how this was originally fixed, and 
> how I can attach it again? It doesn't look like it was soldered. The 
> piezo seems not to be solderable.
> 
> Since the brass pieces form the two contacts of the pickup, if some 
> sort of glue is used, it has to be conductive. Does such a 
> glue exist? 
> It doesn't need to conduct very good, because piezos are high 
> impedance. I already got that "repair conductive silver" stuff which 
> is used to repair broken traces on car rear window heaters, but 
> haven't tried yet. It looks and smells like fingernail polish so 
> probably it doesn't glue good enough.
> 
> Sorry for being OT, this is for a MIDI violin, so at least it's synth 
> related.
> 
> Ingo
> 
> 
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