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hp slider switch replacement or recyclers

D

dansawyeror

All,

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?

Thanks - Dan
 
M

Michael A. Terrell

dansawyeror said:
All,

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?


What is a HP 8505A?

--
Service to my country? Been there, Done that, and I've got my DD214 to
prove it.
Member of DAV #85.

Michael A. Terrell
Central Florida
 
D

dansawyeror

I is a vector network analyzer circa 1982. The switch is a slider. I am
not sure what else they may have been used. I would bet they were common
in that era.

- Dan
 
M

Michael A. Terrell

dansawyeror said:
I is a vector network analyzer circa 1982. The switch is a slider. I am
not sure what else they may have been used. I would bet they were common
in that era.


Do you have the service manual? A part number would make it easier
to find.

http://www.agilent.com only has the operation manual in PDF format.
It shows it as 1978, which would make the design 30 years old. Can you
post a picture of the damaged part on
by attaching it as a GIF, JPEG,
or other common image file?

http://bama.sbc.edu/hp.htm doesn't have the manual, either.


--
Service to my country? Been there, Done that, and I've got my DD214 to
prove it.
Member of DAV #85.

Michael A. Terrell
Central Florida
 
J

Jeff Liebermann

dansawyeror said:
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.
 
D

dansawyeror

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
 
D

doug

dansawyeror said:
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
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.
 
D

dansawyeror

Doug,

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

- Dan
 
D

dansawyeror

Doug,

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

- Dan
 
D

doug

There are lots of 0-80 screws, pan head, flat heat, fillister
head, etc. They just do not come from sears. They will be
stocked at industrial suppliers.
You can get them at the same time you buy the tap and tap drill.
Good luck. It really is easy.
 
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