It was a slow weekend, but I started on the metal for the monoblock pair of V-75’s.

Achievement Unlocked: 75 Watt Class A Zero Feedback SIT Circlotron

Soft clipping at 75W

Because of the high input capacitance of the 2SK180’s and the gain of this circuit, we have to pull out all the stops to get our 75W beast to make audio bandwidth. Here you can see that each SIT is getting its own transformer and buffer.