PCL84 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

15mA, -6.16V BIAS, 270Va

Other operating points

20mA, -3.4V BIAS, 200Va
 3mA, -4.2V BIAS, 270 Va

Traced plate curves


Quite linear pentode with clean spectrum. Some curve bunching at higher voltages but still very usable. Available for sale.

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