Dope/Goop for Voice Coil repair??

Archived from groups: rec.audio.high-end (More info?)

In article <c8rltj0246g@news1.newsguy.com>, bearlabs@netzero.net (BEAR)
wrote:

> Please respond via email as well as the group if you have an answer...
>
> I have a compression driver VC that has about 2mm of the *lead in* flat
> copper wire *on the VC former* that has obviously lifted due to *heat*.
> It is intact and not toasted. I was able to make it flush with a flat
> tweezers.
>
> When lifted, it was probably producing a rub in the gap on some
> excursions
> (no real sign of wear, but it was tough centering the vc in the gap
> with it
> sticking up, which is how I found it using an eye loupe)... enough
> story.
>
> What I need is a goop/dope that will stand up to high temp, like the
> original
> (or better) to lightly coat this little 2-3mm section of conductor and
> hopefully
> hold it permanently in place (I won't be over driving these anyway, so
> it
> won't get as hot as it probably did in SR application).

Silicone rubber (RTV) is good to something over 500 F., and is an
excellent adhesive. You'll have to hold the lead in the proper position
for ~24 hours while it cures.

Isaac

Archived from groups: rec.audio.high-end (More info?)

You need to contact a professional speaker reconer to get materials that are
made for your specific need. There are many on the internet; all you have
to do is find one who is interested in selling materials to a DIY person.

Wylie Williams
The Speaker and Stereo Store

"BEAR" <bearlabs@netzero.net> wrote in message
news:c8rltj0246g@news1.newsguy.com...
> Please respond via email as well as the group if you have an answer...
>
> I have a compression driver VC that has about 2mm of the *lead in* flat
> copper wire *on the VC former* that has obviously lifted due to *heat*.
> It is intact and not toasted. I was able to make it flush with a flat
> tweezers.
>
> When lifted, it was probably producing a rub in the gap on some
> excursions
> (no real sign of wear, but it was tough centering the vc in the gap
> with it
> sticking up, which is how I found it using an eye loupe)... enough
> story.
>
> What I need is a goop/dope that will stand up to high temp, like the
> original
> (or better) to lightly coat this little 2-3mm section of conductor and
> hopefully
> hold it permanently in place (I won't be over driving these anyway, so
> it
> won't get as hot as it probably did in SR application).
>
> The questions:
> - who supplies the vc winders, and what do they use?
> - is there an off-the-shelf item that would work? (even from Loctite
> or
> similar companies)
> - what sort of stuff is current state-of-the-art, what was used 20
> yrs ago?
>
> I have access to almost any supplier, but I'm not sure what is out
> there,
> who makes it, and which companies are making the stuff.
>
> Please don't suggest 5-min epoxy, crazy glue or anything like that -
> those
> things won't stand up to even moderate temps...
>
> This is a diaphragm that is no longer made, so doing a proper repair is
> worth
> the time and effort to acquire the right materials and do it right.
>
> (I can UV cure and/or bake, if need be...)
>
> TIA,
>
> _-_-bear
>
> Please REPLY TO: bear@bearlabs.com