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Interesting...

I fixed my neighbor's Novacron, which had a problem with "low power output" (much like that of the OP in this thread), and it also turned out to be due to what appeared to be an intermittent problem with a bias pot, which resulted in operating one bank of 6C33Cs in near shut-off conditions. (Bias voltage was around -80V, which will pretty much turn off a 6C33C that sees the typical plate voltage in a Novacron.) I gave the pot a few turns in both directions, then re-set the bias, and that alone seemed to cure the problem, which has not recurred. Either that or he had just erred in setting bias. He seemed to know how to do it, so I tend to think the pot was faulty, but I really cannot be sure.


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  • Interesting... - Lew 07:30:12 09/28/15 (0)

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