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Re: magnetrons as diodes

Original poster: HomerLea@xxxxxxx I couldn't pass this one up. 40+ years I built a Cockroft-Walton voltage multiplier using 8020 and 705A tubes. At one point testing it the plates on the 8020s turned red so I thought "oops, better turn it off". Nothing was damaged; don't get a second chance like that with solid state. The tubes also make for a lot more interesting looking device. I still have piles of the tubes so if I live long enough I hope to construct another CW multiplier.
Jim Heagy, old fashion fan of tubes

In a message dated 1/5/2007 9:59:11 PM Pacific Standard Time, tesla@xxxxxxxxxx writes:

Might be a lot more robust than the semiconductor string.  One
advantage of old standard rectifier tubes like the 8020A is that
they'll tolerate oopsies a lot better than a string of 50 1n4007s.

Given the basic design of the magnetron is as a moderate efficiency
power oscillator, I'll bet it would handle the odd flashover or
overcurrent or spike pretty well. The reverse voltage breakdown is
probably in the 10 kV range, too. And, cheap to replace (as compared
to the 8020As, which pretty pricey).