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[AMPS] Henry 2kd classic

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Subject: [AMPS] Henry 2kd classic
From: (Tom Rauch)
Date: Fri, 14 Sep 2001 12:59:43 -0400
> Any dowside risk to gutting the grid cap/choke circuit in the L-7 and
> replacing them it Cu straps between the grid terminals of the socket
> and chassis? Will this affect the termination impedance that the tuned
> input sees significantly?

There are always risks when we change things in marginally stable 
systems unless you just buckle down and do everything correctly.

If I owned a 30L1 I'd use "cathode" bias and ground the grids 
normally, and add neutralization. I'd never use four 811A tubes in 
parallel without cancelling feedthrough capacitance.
73, Tom W8JI 

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