ECL86 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
10mA, -11.55V BIAS, 265Va
Recommended operating point spectrum
20mA, -9.5V BIAS, 260V
Other operating points
40mA, -5.38V BIAS, 215Va
30mA, -9V BIAS, 270Va
2.5mA, -8.85V BIAS, 175Va
Traced plate curves
