[AMPS] Glitch Protection

[k1ta@contesting.com (Bob Marston)]

I have a question for the group that I have seen discussed before. It
regards glitch protection.

It has already been pointed out that fusing the HV supply line provides
little if any protection due to the way fuses blow when faced with a
castatrophic event. What I am considering is inserting a normally closed
vacuum relay in the plate voltage line and triggering it with an electronic
over-current sensor monitoring plate current. I see that the Jennings RF-4
series relays can open as quickly as 4 msec.

Has Eimac ever done any studies delving into how fast an 8877/3CX1200/3-500
transitions from stable to "full-on" parastic oscillation? One would have
to take into accounts that Parasitic Oscillations can range in degree from
mild to severe. Would such circuitry add any degree of protection?

Bob K1TA


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