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Vintage Audio (record players, hi-fi etc) Amplifiers, speakers, gramophones and other audio equipment.

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Old 24th Sep 2023, 12:47 pm   #121
Valvepower
Octode
 
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Join Date: Aug 2008
Location: Rayleigh near Southend-On-Sea, Essex, UK.
Posts: 1,838
Default Re: My parallel stereo single ended triode is now ready :)

Hello,

I must have missed this thread whist I was taking some timeout from the forum for various reasons…

Anyway, looks a cracking build. I’ll have better peruse of the thread next week.

Regards
Terry
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Old 26th Sep 2023, 10:21 am   #122
kalee20
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Default Re: My parallel stereo single ended triode is now ready :)

Good and though-provoking work again, Gabriel!

Quote:
Originally Posted by Gabe001 View Post
The best performing was this one, followed by ecc83 in parallel, with plate to plate feedback. Interestingly, the cleanest signal at the el34 grid doesn't translate to lowest overall distortion!
That's the NFB working for you though... Given that the EL34's distort a bit (they're handling the largest signal after all), if you want a distortion-free output then the signal on the grids have to be pre-distorted in the opposite sense. And that's what the NFB contrives for you!
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