Solder Problems (PDP-8/m related)

From: Jim McCarthy <>
Date: Fri Dec 3 17:50:40 1999

Pete Turnbull wrote:
>> And many indium solders will even wet and stick to *glass*.
> Yes, you just reminded me of a visit years ago to an optical works
> owned by a friend's father. How do you mount an unfinished non-
> circular glass lens in a lathe (of sorts) to finish it? Answer:
> you take some LMP alloy such as you describe, melt it in a short
> cylindical mould, float the lens on top, let it cool, and mount the
> cylinder with glass attached in the lathe chuck. To remove the
> alloy later, place it in a warm water bath.

Apologies in advance for perpetuating this off-topic thread, but at
the optical shop where I worked one summer during my college years,
the "LMP alloy" used for such jobs was either "wax" or "pitch" (pine
tar), not anything as esoteric as indium metal.

                                       -- Jim McCarthy
Received on Fri Dec 03 1999 - 17:50:40 GMT

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