For the users of horns or other high efficiency speakers who build amplifiers with 700 or 900 miliWatts maximum power; would a small signal pentode running Ultra-Linear make a musical amplifier?
Is the idea that U-L increases damping factor over triode operation?
Does voltage regulation on grid2 B+ increase this damping factor?
I'm talking about the original RH84 (cause that is the one I built and listened to). The cathode resistor is 680ohm.
Thanks. Spotted that myself and deleted my post The main point is I've read a lot of critism of or on the RH84. In the end I built it and was/am VERY happy with the sound.That's actually an "RH88." Did you build that with a KT88 output? That would have much higher B+, maybe 450V, which would certainly help the 12AT7 driver work better.