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

[Rob Atkinson <ranchorobbo@gmail.com>]

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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