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[AMPS] How To Design HV Glitch Protection Circuits

To: <amps@contesting.com>
Subject: [AMPS] How To Design HV Glitch Protection Circuits
From: 2@vc.net (measures)
Date: Tue, 13 Jun 2000 21:23:37 -0700
>
>While Eimac suggests a value of R in the screen ckt, experience
>indicates that a value of R in the screen ckt during a flashover will
>allow the screen voltage to ramp above the rating of the screen bypass
>capacitor.  My experience is in VHF and UHF using the 4CX250 and 4CX300
>tubes.  Thus sockets with screen bypass capacitor built in is
>necessary.  The end result, get the check book out, cause a new socket
>is needed.
>
Or, build an amplifier using the grounded-screen, grid-driven 
configuration.  
For the 8171 and larger tubes, it's the only game in town.  .  Naturally, 
a V transient suppressor diode at the CT is mandatory.  

later, Bob.......

-  Rich..., 805.386.3734, www.vcnet.com/measures.  
end


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