6F1P (6Ф1П) Pentode Part

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

12.5mA, -0.7V BIAS, 131Va

Recommended operating point spectrum

10mA, -1.6V BIAS, 150Va

Other operating points

8mA, -1.74V BIAS, 144Va
5mA, -0.87V BIAS, 90Va

Traced plate curves


Another linear soviet pentode with a nice spectrum. Definitely usable. Available for sale.

Copyright © 2022 MV Audio Labs. Legal Disclaimer.