Monthly Archives: March 2016

V-FETRON 75 UPDATE #1

Achievement Unlocked: 75 Watt Class A Zero Feedback SIT Circlotron

75wclip
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.

vfetron75

vfetron75bench

vfetron75thd