[Amps] SB220 running plate current when no drive; Problem

[Joe]

What is the current (pun intended) max grid current for a pair of 
3-500Z's now days?

And does it matter what the Plate voltage is?

Joe WB9SBD

On 10/8/2020 6:39 AM, Rob Atkinson wrote:
> Never heard of an ICAS rating for the 3-500.  I have a dual 3-500
> amplifier with a pair of 20 year old RF Parts 3-500s and they're still
> at full output, but they have been run conservatively especially with
> regard to grid current.
>
> 73
> Rob
> K5UJ
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