Attached is a schematic of a hybrid power amp using a tube triode and a 2SJ20 SIT. The idea is inspired by the J2. I want both gain stages to be triode-esque. Both gain stages are undegenerated as a start.
What value of R1 makes for a good source resistance to drive the gate of the 2SJ20?
The exact triode to be used is undecided. I have ordered an assortment to characterize. The intent is to have enough current to drive R1 to drive the SIT rail-to-rail. Multiple tubes may have to be paralleled to obtain enough current. Curve tracing and matching tubes is no problem.
What value of R1 makes for a good source resistance to drive the gate of the 2SJ20?
The exact triode to be used is undecided. I have ordered an assortment to characterize. The intent is to have enough current to drive R1 to drive the SIT rail-to-rail. Multiple tubes may have to be paralleled to obtain enough current. Curve tracing and matching tubes is no problem.