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pentode phase splitter

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Bill*B

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Joined 2004
home.tampabay.rr.com/bushman/index.htm
#1
In chapter 12.6 of the Radiotron Designer's Handbook, mention is made - and a schematic illustrated - of a 6AC7 used as a phase splitter. The text states "a pentode with an unbypassed screen. The two output voltages are taken from plate and screen, and the suppressor grid is maintained at a negative potential with respect to the cathode." Reference is made to an article by P.G. Sulzer "Applications of screen-grid supply impedance in pentodes", in an August 1948 periodical "Communications".

I'm struggling to understand the concept. Can anyone quide me?
Regards, Bill.
 
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