6Z5P (6Ж5П)

All tube operating points below are by no means definitive good sound recipe for your particulate tube project. Lowest THD point is not necessary best sounding one and there is always some variance even in a NOS tube batch from the same manufacturer!  Below information is only useful as a general starting point and is ment to get you in a ballpark when no measurement equipment is available.

Lowest THD operating point spectrum (recommended)

12.5mA, -1.25V BIAS, 150Va

Other operating points

10mA, -1.48V BIAS, 150Va
7.55mA, -2.6V BIAS, 150Va
5mA, -2.6V BIAS, 150Va
3mA, -4.2V BIAS, 200Va

Traced plate curves

THD statistics


Another linear soviet pentode. Clean spectrum in all current range, easy to BIAS with single red LED. Available for sale.

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