PCF82 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

4.5mA, -7V BIAS

Other operating points

3mA, -8V BIAS
7mA, -3.4V BIAS

Traced plate curves


This is certainly a vary μ pentode, but spectrum is quite clean. Maybe good enough as a buffer (cathode follower). Available for sale.

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