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Old Fluke Multimeters
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Fungus:

--- Quote from: drtaylor on November 08, 2013, 12:39:42 am ---You can use tantalum caps in the 7660 circuit. At the time, 100uF 16V tantalums were larger than the aluminum caps and very expensive. With the lower ESR of a Tantalum you may be able to lower the values some, say to 68uF/16V. However, Aluminums are so much better today. If you buy a high temp 125 deg 5000 hour aluminum cap you would probably last another 30 years with no problems (and cost way less than tants). Just stay away from 85deg 1000 hr crapcaps. A low ESR cap would perform better than the originals. When I have time, I'll make some recommendations for replacement caps. The caps aren't under much stress in the 8060, so it was just a temperature and aging thing that has caused so many 8060s to get contaminated by the caps spewing. I looked at my five 8060s yesterday and saw no evidence of cap failure. That might change when I try to get them operating, but they have had a very easy life in my cool temp garage and not being powered up very often.

--- End quote ---

This is the post I was looking for earlier. Is Dr.T still around? I haven't seen him for a while.  :(
bitseeker:
That's a great looking specimen, Fungus. Congrats!

Leaking caps are the primary issue I recall. Some have dying LCD screens, but you're OK there.

Dr. T. is around. I saw a few posts from him recently. IIRC he's in the middle of a job/project.
tautech:

--- Quote from: Fungus on August 10, 2017, 12:10:36 am ---This is the post I was looking for earlier. Is Dr.T still around? I haven't seen him for a while.  :(

--- End quote ---
You haven't been looking hard enough.  :P

From his profile:
Last Active: Today at 11:13:07 AM (NZ time)
Fungus:

--- Quote from: bitseeker on August 10, 2017, 01:01:21 am ---That's a great looking specimen, Fungus. Congrats!

--- End quote ---

No manuals or paperwork but the meter looked too good to pass up.  :-DMM

(I'm working on that other stuff)


--- Quote from: bitseeker on August 10, 2017, 01:01:21 am ---Leaking caps are the primary issue I recall. Some have dying LCD screens, but you're OK there.

--- End quote ---

I'm just enjoying the AMP hour podcast with Dr T. telling stories about making these meters.

He says the screen problems are mostly with the 8020A which used American made screens for political reasons. The 8060A screens were made by Sharp and hardly ever die.  :-+

Another tip: Don't touch the PCB. Fingerprints are bad.



--- Quote from: bitseeker on August 10, 2017, 01:01:21 am ---Dr. T. is around. I saw a few posts from him recently. IIRC he's in the middle of a job/project.

--- End quote ---


--- Quote from: tautech on August 10, 2017, 01:04:53 am ---From his profile:
Last Active: Today at 11:13:07 AM (NZ time)

--- End quote ---

So I'm just not in the right threads.  :D

bitseeker:
Ah, I have not listened to that episode. I'll have to do that.

That's great news about the 8060A screens. I still look forward to buying one of Dr. T's 8060s in due course.
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