Tim Schulz wrote: > Greetings again fellow listers - I have been trying to build a voltage > multiplier to replace what I believe to be a dead one in my 5062C ion > pump power supply. I downloaded the 5061service manual (thanks > Leapsecond!!), and it states that it is a doubler in that power supply. > I long ago got rid of my HV parts stock at a ham swap foolishly thinking > that I wouldn't be needing them, so I had to pay $6 each for a couple of > NTE 2Kv PIV diodes at the local parts house. I decided that HP might > have used Greinacher type doubler and put one together using some 2Kv > rated .01uf ceramic caps. What I got out of it when hooked up to the > ion pump ps was about 1.77Kv AC according to my Fluke 8060 and high > voltage divider probe. So I guess I am not quite there yet and would > appreciate more guidance in that area. I did get a Bertan 5Kv > adjustable PS off ebay as a plan "B" if I can't fix the original > supply. I also tried to dissolve the potting material on the defective > module, but sitting in xylol for 2 days hasn't done anything. > Also, I was wondering if Cs tubes could be stored for long periods (say > 10-20 years) as long as the ion pump was kept active or at least at > regular intervals. I was wondering what the failure modes might be - > air leakage, or does the cesium sublimate over time out of the oven? > Also, is anybody able to rebuild Cs tubes? Again, I am wondering if I > would be able to find a replacement down the road for the compact tube > in the 5062. > Thanks again! tim > > If the potting is epoxy tetrahydrofuran may be more effective.
Bruce _______________________________________________ time-nuts mailing list -- [email protected] To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.
