Power Control of Pentodes: 6L6GC & Beyond

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The discussion focuses on finding information about controlling the output power of pentodes, specifically the 6L6GC, by varying the screen grid voltage. Participants express difficulty locating output characteristic data related to the control grid and screen voltages in existing manuals. A suggestion is made to consult the Frank Phillips 6L6 link for more comprehensive data than the RCA book. The aim is to identify a family of curves that illustrate the relationship between plate current and control grid voltage at different screen voltages. Further study of the provided resources is encouraged to gain a better understanding.
yungman
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I read a few pages of what BobS posted and I read through the RCA Receiving Tube Manual. But I cannot find any info on the output characteristic and power when varying the screen grid of the pentodes.

Bottom line is I want to find a way to control the output power of a pentodes like 6L6GC etc.
 
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is there not a family of curves Iplate vs Vcontrol grid for various screen voltages?
tomorrow i'll look at mine...

see the Frank Phillips 6L6 link here
http://drtube.com/tubedata.htm
http://www.mif.pg.gda.pl/homepages/frank/sheets/093/6/6L6GC.pdf
around page 5
 
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Thanks, this is a lot more complete than the RCA book I have. I have to study it more.
 

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