"Ken Winterling" <[EMAIL PROTECTED]> made an utterance to the drakelist gang ---------------------------------------------------------------------- Tom,
There is a 220K bleeder/load resistor, R8, across the medium B+, 250V, supply to ground. If it is open the medium B+ will be pulled up toward the HV. Let us know what you find. Ken, WA2LBI
On 1/14/07, Tom Taylor <[EMAIL PROTECTED]> wrote: > Still working on the AC-3... The drakelist wisdom was the 20k load resistor > didn't present enough of a load, compared to the original 10k resistor, and > that was the reason the HV kept climbing. I ordered a 10k 10w resistor and > it recently arrived and I installed it in place. Note that this resistor > connects the HV+ with the medium voltage B+ (which seems odd). With this new > resistor, the HV now reads a reasonable and respectable 720v (no load). > That's good. But the medium voltage now reads 570v !!! I can't explain it. > What's different about the medium voltage supply is I replaced the two 100 > uf caps with 330 uf caps and the 80 uf cap with a 120 uf. That's what I had > in my junk box. Why is that supply so over-voltage now? Perhaps I have a > wiring error, though I carefully checked for errors. > > Thanks, > Tom n7tm >
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