Products > Test Equipment
John Fluke 301E Power Supply Manual?
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The Doktor:
I've got a John Fluke 301E Power Supply and would like to download a manual. Anyone know a source? I had one a few years back, which somehow disappeared. Nothing at BAMA, and google doesn't seem to be helpful.
VacuumTubeAudio:
Hi, are you still looking for a Fluke 301E power supply manual? I happen to have one for this very rare vintage Fluke supply, printed in 1969, that I would be happy to scan for you. But it might take me a few days until I could get to it.

I was able to restore mine successfully a couple of years ago and it works great. But it took a lot of work. There are some unique components in this design like: thyrite varistors, chopper relay, mercury cell battery, and a weston cell battery, that are no longer available anywhere. But if is possible to hack some substitute parts together for these and get it working. The only problem I have with mine is the front panel meter M1 is broken and I have not been able to locate a suitable 0-1 ma, 4 1/2 “ substitute. If anyone has one please let me know.

If you are up for a challenge, restoring a Fluke 301E is a good one, and well worth the effort!
The Doktor:
Hi, thank you for your offer. As luck would have it, I am no longer looking for a manual. It looks like I purchased a manual in late July 2013 from a place called Manuals Plus in Maryland. According to what is written inside the manual, it covers serial number 123 and above. I found that manual by accident a few weeks ago, it was stacked on a shelf about 5 feet away from where I usually sit. Most likely since I first got it. I will be quite certain it does not get lost again, and may at some time decide to scan it and uploaded to BAMA. Searching for another one for almost a year did not prove fruitful.

I think most of the more exotic components will be fairly easy to substitute. The Weston cell could easily be done with a small power supply, the sophistication of which will depend on accuracy desired. I saw somebody post a replacement for the thyrite varistors which is just two resistors and a diode, not exactly equivalent to original but should work fine. About the only component which may turn out to be a tough thing if it needs replaced is the chopper. I also suspect that the chopper will be just fine with a little bit of cleaning and lube. If not, a solid-state replacement will need to be designed. Should be too incredibly hard Unless some of the voltages get high. I know part of it is used for synchronous rectification, but not sure just how high the voltage is in that section until I start working on this thing.

I think I probably am up to the challenge, question is can I get myself to start.

As to the broken meter on yours,You should post on the Buy/Sell/Wanted forum, there are a lot of people on this board, one of them may be able to help.
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