Quote:
Originally Posted by Zenith6S321
Steve McVoy, PM sent.
Is it possible that the internal CRT resistor reduced the current draw and allowed the HV to exceed the 30KV cap rating?
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I don't think so, since the current load from the CRT normally goes to zero on a black screen, and the regulator takes it all.
A shunt regulator works by measuring the current at the bottom of the flyback and keeping the total constant. Total current is divided between the CRT and the regulator, depending on how much the CRT demands. If the regulator fails, you could get an overvoltage, but not if it's working normally.