03-22-2020, 04:14 PM
Yes that's correct! The plate and screen grid are connected together in the triode configuration. So the plate impedance is going to be 7000 ohms instead of 4000 ohms. It very common in pentode tubes to have the suppressor grid and cathode connected together internally. The pentodes that have the sp grid separate from the cathode internally the sp grid can be used as an second input but the thing is that by the time the electrons get to the sp grid it doesn't have much control over the electron flow.
When my pals were reading comic books
I was down in the basement in my dad's
workshop. Perusing his Sam's Photofoacts
Vol 1-50 admiring the old set and trying to
figure out what all those squiggly meant.
Circa 1966
Now I think I've got!
Terry
