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This Post Has Been Edited by the Author
In Reply to: RE: Too low plate R value for a triode ? and CCS substitution? posted by dave slagle on March 23, 2017 at 10:28:53
What I was trying to say, and doing a poor job, is this.....If you keep the plate load resistor high enough as to not substantially increase the HD, the amount of gain reduction is so small as to be of no real consequence.
Of course the gain will drop if you load the tube with a vertical load line but why would anyone do that?
I guess I should ask Victor.
"I have just bought a BAT VK5se preamp for good deal.
What I have found is the plate resistor being abnormally low value for the parallel 2 section of 6h30. The plate R of 6h30 per section shown in EH datasheet is 840 ohm per section then parallel 2 section is 420 ohm.However the plate resistor is only 1250 ohm which is less than 3 times of 420 parallel section of 6h30. Is it normal for high priced preamp design?"
So Victor wasn't just "saying" that you can lower the gain of a tube by loading into a vertical load line, Victor is actually "doing" just that.
Tre'
Have Fun and Enjoy the Music
"Still Working the Problem"
Edits: 03/23/17Follow Ups:
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