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Old Fluke Multimeters

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gearhead:
I have an 8020B that I got about 15 years ago, works like new. And I have an 8000A, 8600A, and 8050A benchtop meters. The 8000A was a new unused military issue unit that I use as a reference. The 8600A works like a champ. I've had to replace the NiCad batteries twice. The 8050A has an issue with the RMS converter. I'm about to unsolder it from the main PCB and check the components on it. I can get everything except for the Fluke IC. Maybe I'll get lucky?
So here's a pic of them

eugenenine:
I have an 8050a like the bottom one.  I've replaced the batteries a long time ago and just recently pulled them and wired a 7805 in place so its just line powered.

gearhead:

--- Quote from: eugenenine on December 24, 2015, 06:42:40 pm ---I have an 8050a like the bottom one.  I've replaced the batteries a long time ago and just recently pulled them and wired a 7805 in place so its just line powered.

--- End quote ---
I really like that 8050A, good units. But I LOVE the red LEDS on the 8600A. Can see it from across the room.
I''m hoping I can narrow down my RMS Conv. issue and repair it. Everything works but AC volts and mA.

IconicPCB:
Is there a specification on the battery option toroidal transformer?
I would like to implement it.

gearhead:

--- Quote from: IconicPCB on December 26, 2015, 07:01:10 am ---Is there a specification on the battery option toroidal transformer?
I would like to implement it.

--- End quote ---
I haven't seen that, but there is a thread here thats shows how to delete the battery option.
https://www.eevblog.com/forum/repair/fluke-8050a-repair/

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