On 02/22/14 17:15, Jim Garland wrote:
/*snip*/
blowing the fuse and tripping the power supply magnetic circuit
breaker. with a boom. When this happened, the plate current was about 1.5 A,
roughly 65% over the fuse rating. I believe the fuse opened because of a
flashover in the tube and not because its rating had been exceed. If it
had opened because of high steady-state current, there's no reason the
circuit breaker would have also tripped.
/*snip*/
Remember, there does not have to be a anode to cathode arc to draw an
unlimited amount of plate current, a plate or screen grid to G1 arc will
turn the tube on to the max.
--
Ron KA4INM - Youvan's corollary:
Every action results in unwanted side effects.
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