PCL200 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

20mA, -4.6V BIAS, 260Va

Other operating points

15mA, -4.96V BIAS, 260Va
10mA, -5.3V BIAS, 260Va 

Traced plate curves


Marvelous pentode! THD and spectrum is very similar to D3A just with a slightly lower μ. Very large linear region. Another sleeper tube.

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