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If you want to make a phase splitter like in that article then you have to bypass the cathode.
couple of snippets from the article:
“However, with a negative bias of 45 volts on the suppressor the gain decreased to zero”
“the negative bias on the suppressor grid caused the formation of a space charge between the screen grid and suppressor grid, which effectively increased µsg – µp”
What happens in this circuit is when the suppressor grid is negative enough, voltage swing on control grid has no effect on the plate but control grid has effect on the screen grid and screen grid has effect on the plate.
Another way to do a phase splitter with a pentode is to make similar circuit but drive the suppressor grid instead. This way you get inverted output from plate and in phase from screen.
Yes, I got them. Thank you.
couple of snippets from the article:
“However, with a negative bias of 45 volts on the suppressor the gain decreased to zero”
“the negative bias on the suppressor grid caused the formation of a space charge between the screen grid and suppressor grid, which effectively increased µsg – µp”
What happens in this circuit is when the suppressor grid is negative enough, voltage swing on control grid has no effect on the plate but control grid has effect on the screen grid and screen grid has effect on the plate.
Another way to do a phase splitter with a pentode is to make similar circuit but drive the suppressor grid instead. This way you get inverted output from plate and in phase from screen.
PM to you, did you get them? BTW, this is the result using the 6SJ7 model:
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