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In Reply to: RE: Rosenblit Also Got This Wrong posted by elblanco on June 13, 2021 at 20:32:54
Its cathode is not grounded. Not even close. On that basis your equation set needs attention.
cheers,
Douglas
Friend, I would not hurt thee for the world...but thou art standing where I am about to shoot.
Follow Ups:
okay CCS.
still doesnt change the fact that gain is slightly higher with grounded grid.
No?
Those two bits are symmetrical. neither cares where the signal comes from because each is loaded identically.
IOW, try and show how the bit with the grid grounded is actually different from the one we are applying signal to.
I say both are the same in this particular LTP circuit.
Douglas
Friend, I would not hurt thee for the world...but thou art standing where I am about to shoot.
but the tube section on the right has different characteristics due to transconductance being higher. Grounded grid Gm is higher. they are essentially two different tubes.
That is what I am trying to get you to see; the one is no more a grounded grid deserving special treatment than the other. I asked you to point to the reason that one is indeed as you describe, and thus deserving of the special consideration.
The nominal 'input' section is electrically identical to the one you refer to as grounded grid.
cheers,
Douglas
Friend, I would not hurt thee for the world...but thou art standing where I am about to shoot.
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