PCF802 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

7mA, -2.77V BIAS, 170Va

Other operating points

6mA, -3.14V BIAS, 175Va
 3mA, -4.2V BIAS, 270Va
5mA, -3.4V BIAS, 176Va 

Traced plate curves


ECL802 with 9V heaters. Linear high μ triode-connected-pentode with a clean spectrum. Very usable. Available for sale.

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