| Products > Test Equipment |
| Restoring / Repairing an old Fluke 8000A |
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| joeqsmith:
--- Quote from: NoisyBoy on January 11, 2020, 10:47:40 pm ---vinlove, while it may be related to the capacitor, and it is not a bad idea to change out-of-spec caps, I would suggest follow the troubleshooting guide while the meter is in failed mode. It may help you to pinpoint the cause for failure. --- End quote --- --- Quote from: vinlove on January 12, 2020, 11:41:10 am ---Great advice NB. Yup, will replace the capacitors, and see how it will perform. --- End quote --- I wonder how we ever made it to the point where the first step in troubleshooting electronics is change all the capacitors. |
| med6753:
--- Quote from: joeqsmith on January 12, 2020, 03:57:23 pm --- I wonder how we ever made it to the point where the first step in troubleshooting electronics is change all the capacitors. --- End quote --- Apparently you have not attempted to restore vintage vacuum tube equipment. You can be assured, with 100% certainty, that all the wax tubular and electrolytic capacitors will be leaky and require replacement. SOP is to replace before the first power up is even attempted. The only general exception to this rule is vintage vacuum tube Tek and HP equipment. They tended to use much higher quality capacitors which last near indefinitely. When it comes to vintage Flukes such as the 8000A, 8600A, 8800A, etc my personal experience is that at least one electrolytic capacitor in the power supply is shorted. So it makes perfect sense to replace all of them as insurance for trouble free operation. I could go on concerning beaded tantalums in Tek equipment from the 1970's thru 1990's but I think you get my point. |
| med6753:
--- Quote from: vinlove on January 12, 2020, 11:39:25 am ---edavid, no, it doesn't. Cap. means capacitor. My 8000A is a mains version. No nicads. 10$ in USA? I see on eBay a few of 8000A are going for $40 there about, but it is not about money. I like the 8000A, and was wanting it for many years. I like the LED display in red colour. And this is a historic meter, which had been in many electronics magazines and used by millions of electronic enthusiasts. It means something to me. Plus, when meter or set is not working properly, and no matter what the price or monetary value is, if I worked and serviced on it, and when it works again properly, it gives good feeling. That is what all is about. --- End quote --- Don't let the nay sayers discourage you. The 8000A is a perfectly serviceable 3.5 digit DMM with good accuracy when fixed up and calibrated. And I'm partial to ruby red LED's myself. :-+ |
| NoisyBoy:
I bought two units years ago for the same nostalgic reason. While I was in undergrad, the 8000A series were backup meters in the lab, everyone was using the newer HP meters. I rarely needed the high precision of the HP, so I would grab a 8000A as my personal meter that I didn’t have to share with others and could have it hooked up to my projects until the lab was over. As Joe had mentioned, I got a 8000A that is main only, and one is the Ni-Cd model. The Ni-Cd model is in storage that I cannot locate, but the main model was fully restored and calibrated. It is not precise, but accurate and reliable. I enjoy the pride to see it working fully within spec with Joe’s guidance in the calibration. Its red LED and those big, hard-to-press range switches bring back a lot of treasured memory. Its biggest drawback is the lack of auto ranging, if I have multiple test points with varying voltages, due to its lower precision, I often had to change range constantly. But beyond that, it is fully serviceable in the lower voltage work that I do. It is not my primary meter, that goes to the Keysights in the hobby lab, but a great “toy” meter. |
| edavid:
--- Quote from: vinlove on January 12, 2020, 11:39:25 am ---10$ in USA? I see on eBay a few of 8000A are going for $40 there about, but it is not about money. --- End quote --- You have to look at sold listings. Anyway, people don't bother listing them on eBay, since they are worth so little. At hamfests etc. they are $10 or less. --- Quote ---I like the 8000A, and was wanting it for many years. I like the LED display in red colour. And this is a historic meter, which had been in many electronics magazines and used by millions of electronic enthusiasts. It means something to me. --- End quote --- I like it too (I have 5 of them), but if I had one as trashed as yours seems to be, I would just buy another one :-// |
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