Must be I guess. A friend found this with
some GU84´s also, not uncommon it seems.
73 Jim SM2EKM
--------------------------------------------------
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.
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