>
>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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