Bruce, Good to know, for several reasons: first, my original plan was to epoxy the switch body back in place after cutting the heat staked pins, and trying to free the stuck switch with silicone

Probably... if I live long enough to get around to it... I'll post some stuff about 7A42. But, I looked at it... and in it... and just looking at it makes me think there's not much chance of it

Hi Jeff: Unless it a collectable's compulsive buy... why do you need one of those old LAs? To actually use it, you need the pods and the cables... which usually don't come with them.... but,

Yes, I agree... and of course it's a preference thing... but HP LAs appeal to many here, while HP scopes lose out to Tek. Lots of old HP LA holding down the basement floor everywhere... they're not

Hi SD Well... it's hard to find one with the pods, and expansion modules... but they're usually in good shape cosmetically (they're 40 years old!)... and just the analyser (sans pods, modules) isn't

If you are ever going to adhesively bond (aka glue) any part of the assembly I would not use any silicone product. They are almost impossible to remove and adhesives don't stick to them.

Small...15 volt uni-polar... even bi-polar... pure chinesium... 15 VDC power supplies are quite affordable (less than, or about 20.00 USD)... about 3A or 5A. The quality varies... but, some have a

Greg, I happened to have a NOS latch in my box of small hardware. Measurements and a few pics could be found here for some time: www.hakanh.com/dl/temp/172_latch.pdf /Håkan

snapdiode, I see a bunch of 1240s and 1241s on the unnamed auction site, all around $100 or $150. Most are listed as "parts only" but a few are "pre-owned" which is supposed to mean "working". I've

I am nothing if not obscure and limited. -- Jeff Dutky

Any recommendations on what silicone lubricant to use? There are many to choose from: two kinds of WD-40 "specialist" (blue and white can vs. black can), 3M (dry and wet versions), DuPont (squeeze

I have one.  If you have a logic analyzer, it's a bit nicer than the 7A42.  (since the 7A42 is double slot in size, you can't put in an analog channel.  What you get is thresholds and logic

For certain limited and obscure definitions of "fun". Harvey

And then there is the 7A42 plug-in, the logic-triggered amplifier which can trigger on Boolean AND / OR / NOT etc. on 4 inputs. Tek recommended use with the P6230 Variable Bias probe for probing

Harvey, Thanks for looking. I jumped on this 7B92 because I knew that they were rare, and the price was comparatively good ($45 including shipping). It was not advertised as working, so I'm merely

Sorry, I just looked.  Almost everything I have is from a 7B70 or a 7B71, with some possible parts from a 7A18 and 7A26.  Apparently I either didn't take apart any 7B92's or I saved the front panel

Dear group, I have two 172 programmable test fixtures for the 576 curve tracer, and both suffer to common problem of having a broken plastic latch to keep the programming card door shut. Since the

Harvey, The exact part number is 670-1589-00 and the board has silk screening on it that indicates it is the "SOURCE SW" for the "TYPE 7B92" (and part number "670-1589") so it would be hard to

Hmmm, I will have to try silicone spray on the sticky switch in my HP 11720A pulse modulator.  Not that I  really use it, and if I did, I'd probably just buy another 11720A on the famous auction

I won't say that they are, but they do seem to be similar.  I tried to repair them, but ended up buying a replacement switch simply because it worked better.  May well have been some other problems