[Amps] Bias Whoes

[Jan Erik Holm]

Must be I guess. A friend found this with
some GU84´s also, not uncommon it seems.

73 Jim SM2EKM
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K7RDX wrote:

> Plate voltage has large influence on idle current...gi7b with 2kv/pl works
> good with 48v/50watt zener diode,assuming proper grounded grid
> design...Nearly every Russian tube (Triode) Iv`e played with shows somewhat
> diffrent idle current with the same value of bias...Could it be quality
> control? Jim.
> ----- Original Message -----