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RE: Geez...

50.4.127.98

PakProtector

In Reply to: RE: Geez... posted by Tre' on October 15, 2024 at 19:01:27

" Also none of them, no matter how you operate them, are as linear as a directed heated triode."
I am sure you have seen the anti-pentode, plate-to-grid traces on DIY Audio. There are a few iterations/variations, but for fun there was a before and after of a MOSFET. It went from horizontal drain lines to exceedingly evenly spaced verticals this way.
Add to that, not all DHT are created equal either. There is a fair variation there... :)
I would throw down a gauntlet, for a 10k a-a load, presented as a 5k SE, I get 500V delta plate on a positive grid swing, and a 450V delta upwards on a negative swing. A shallower load line would no doubt assist in improving that.
Douglas

Friend, I would not hurt thee for the world...but thou art standing where I am about to shoot.

Edits: 10/17/24

Follow Ups:

RE: Geez... - Tre' 09:10:23 10/17/24 (2)
"I am sure you have seen the anti-pentode, plate-to-grid traces on DIY Audio."

I have not. I will take a look. Thanks.

When I said "no matter how you operate them" I was referring to the three ways that Ralph and I were talking about. Pentode, UL and triode.

Tre'
Have Fun and Enjoy the Music
"Still Working the Problem"
- RE: Geez... - PakProtector 03:58:27 10/18/24 (1)
  The plate-to-grid FB circuits are most certainly rigged as pentodes.
  I can quite agree with you on the idea that particular FB method makes something 'new' and out of your limits.
  
  Just to get you started... :)
  Douglas
  
  Friend, I would not hurt thee for the world...but thou art standing where I am about to shoot.
  - https://www.diyaudio.com/community/threads/single-ended-the- (Open in New Window)
  Edits: 10/18/24
  - RE: Geez... - Tre' 20:54:34 10/18/24 (0)
    It's not out of my limits. It's just outside the context of the conversation I was having with Ralph.
    
    Thanks for the link. It looks interesting.
    
    Tre'
    Have Fun and Enjoy the Music
    "Still Working the Problem"

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