The advantage is no need for a capacitor
on the lower cathode resistor because
with no load it is unnecesary.
Link below for the page on the
circuit theory description.
>> What determines optimum inductance?
The most inductance that has the right DCR.
More inductance provides a flatter loadline
and better isolation between stages.
No such thing as too much inductance.
A tube with a higher gm helps too.
>> I wonder how stable the output DC would be
>> for direct coupling.
Just a stable as an SRPP which is
used for direct coupling all the time.
DanL
