I have been toying with pen and paper...
It looks like like the grid circuit to the 6CW4 could have an isolation
capacitor inserted to remove and DC bias from the gate of the replacement
fet. And, the plate of the 6CW4 circuit could have the B+ side of the rf
xfrmr moved to a low volage supply (perhaps rectify and filter a 12v AC
heater supply to supply the new voltage.)
And, a proper bias supply constructed to supply a necessary bias to the
gate...
And, ideas?

Regards,
John


"John Smith" wrote in message
...
Anyone ever replaced a 6CW4 Nuvistor with a fet or other transistor?
Got a schematic? Idea of one?

Regards,
John