On 08/10/2013 04:57 PM, Marv @ Home wrote: > A 6.5 or better will find a good home and be appreciated in your lab, Joe. > Many orphans need homes always appear on eBay, particularly the top line of > its day HPs: 3455a, 3456a, and 3457a.
Agreed! I bought a 3455A when it was new. It was a workhorse in my lab for
years, then it sat on the shelf for a few years. When I fired it up a tantalum
cap smoked. Replacing that had it running again. After a few months, a RAM
chip went out, after replacing it another error surfaced that I have not tracked
down.
Since fighting the 3455A, I have purchased three 3457As on Ebay. They are
always on and I have had no problems with them. They are my current favorite
DMMs. All three indicate within a few ppm at +10.00000 volts (I have not
adjusted / calibrated them).
I think HP got a lot right with the 3457A. Wish I could afford a 3458A!
--
Bob Smither, PhD Circuit Concepts, Inc.
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Government is not healthy for children and other living things.
-- Jeff Daiell
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