PCC84


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


5mA, -3.48V BIAS, 263 Va

Traced plate curves


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ECC84 with 7V heater. Available for sale.


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