Doug,

Thanks, I will look into that. Are there 0-80 screws?

- Dan

doug wrote:
dansawyeror wrote:
Thanks for the reply. No the actual contact sliders came loose from
the plastic slider. The copper/gold plating is fine. Upon inspection
two of the slider assemblies are broken.

- Dan

Jeff Liebermann wrote:

dansawyeror hath wroth:

One of the 3 contact slider switches on an HP 8505A is broken. Does
anyone know of a 'junk yard' or recyclers for old parts?


Which switch? I see several on the front panel:
http://www.teknetelectronics.com/Search.asp?p_ID=1418&pDo=DETAIL

As I vaguely recall, there is no switch assembly. The contacts are
gold plated traces and large pads on the circuit board. The plastic
slider has one or more spring loaded contacts inside. The usual
problem is that the plastic slider become brittle with age and just
crumbles. Usually the tapered handle that goes through the front
panel is what breaks off. Is this what happened to yours? If so,
think about taking it apart and just attaching a different handle. The
rest of the switch assembly is just fine.

For hp test equipment parts and pieces, see:
http://www.sphere.bc.ca/test/hpparts.html
I couldn't find any switches.



This is a standard problem with lots of HP equipment of that vintage.
What we have done is to tap 0-80 holes into the plastic and then
reattach the slider to the plastic. I have probably done this fifty
times and I have never had one break a second time. The design was
not good and the plastic nipple would break off. Any older parts you
get would end up with the same problem more than likely.