New Year’s curves New Year’s afternoon spent in tracing some curves whilst testing pentode drivers (4P1L, 47 and others). Here are some new curves: 4P1L (Pentode and Triode) 47 Pentode (3 screen voltages) 6P15P (Jazz request on DIYAudio) Cheers! Related Author: Ale Moglia "A mistake is always forgivable, rarely excusable and always unacceptable. " (Robert Fripp) View all posts by Ale Moglia