Products > Test Equipment
Old Fluke Multimeters
ModemHead:
--- Quote from: drdanke on July 25, 2016, 10:10:48 pm ---I purchased it from a local estate sale for $5. Fluke 8060A in unused condition. Absolutely mint in box with case.
--- End quote ---
I hate you. >:D
Judging by the condition of the box, carrying case, and the fact that the probes are newer style, this one is probably one of the last sold, which was well into the 90s. The caps may very well be just fine, but an inspection wouldn't hurt.
Enjoy!
lowimpedance:
Soo shiny, what a beauty..... almost to good to use :D.
Lucky bugga enjoy.
Seriously though as has been suggested do check those caps, would be a crying shame to have such a minty outside with a ruined inside.
Enigma-man:
I have an 8500A with only the voltage option. Last year, around this time, I put in an AC filter module because RFI made it unusable.
If I turned on my Brunelle function generator, the Fluke went crazy. Solved that problem after the filter was added.
After a period of time, totally random, the display would go blank. Turning the power off and on restored operation. Sometimes
it would work for minutes other times I could leave it on for days without a problem.
My controller had 2708 eproms on it and they drew a lot of power. The eprom PCB was burned where the regulator was soldered to the board.
There was no heatsink and no room for one either. The regulator was temporarily mounted on the side chassis to act as a heatsink.
I began to have fears of the 2708's losing their data or one failing. I had enough unused ones to reprogram, but no 2708 programmer.
There was an Apparat programmer that I had from my old TRS-80 Model III and Model 4. I tried firing up a Model III but the diskettes were
probably NFG or maybe the disk drive was at fault. Needless to say, wasted time and going back to TRS-DOS wasn't going to happen.
All that knowledge went out of my head as I needed to make room for PC related stuff and later the insidious and vile Windows 95.
I remembered that I had converted a Rad Shack CoCo 1 as an eprom programmer in the late 80's. Apparently, I was smart enough to have a sticker
that read "exec 49152" still attached. All I needed was a monitor to hook up to it. No CGA/EGA/VGA was going to cut it. It was composite video.
At this point I should have found a DeLorean, Marty McFly and the Doc to go back to 1988 when all this old sh*t worked and I knew what to do with it...
I managed to find an old Panasonic 9 inch (22.86 cm for us metric guys). It worked and I was ready to read and program some 2708's.
Then I had a brilliant idea. Scrap the 2708's and put in 2716 or 2732 single 5 volt units. Modifying the PC board was a piece of cake and within
hours I was reading in the 2708's and programming the replacement 2732's. I didn't have enough 2716's. It took time to erase the 2732's and some were
faulty, but in the end I was successful. I plugged in the controller and turned on the power. It worked.
The 8500A still has a problem. So far I have replaced some cmos and 74LS series chips and even the 8080A CPU with no success.
This problem was present before I did the eprom modification so I know it isn't that. Without other boards to plug in, I'll have to live with it until another comes along.
I saw on either the first or second page an 8500A had its controller die and the owner parted with it. I think that was a few years before I got mine so if I was a member
here I would have shaken my head and said "Too bad for the 8500A" and moved to the next posting in the thread.
Anyway, the 8500A 2708's are in an antistatic tube in case someone out there may need one.
Excavatoree:
Awesome find, drdanke. I'll be a third voice urging you to take Retiredcaps' advice. I thought "these are fine I don't see any leakage" but I removed the capacitors as his insistence. I'm glad I did. The board damage occurs below the capacitor and is almost impossible to see.
Yours is so nice, I'd have for you to not catch a problem when it's easy to fix.
retiredcaps:
@Excavatoree
You and your Fluke staircase photo got a shoutout on Dave's eevcomment #1
I can't find the exact time index right now for it.
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