As I see it, the functions of P1/P2 are described clearly. (just like in F5)
Confusing might be
but that is rather simple: as you trim P3 the source of either one or the other transistor has less resistance hence less 'negative voltage' (referring to the input), then the current (in)decreases and to set the 0-volt you again change P1/P2 to get the balance in. Very elegant method I'ld like to say.
I also like the method of splitting AC and DC balance.
How would that work out in F5?
albert
I don't know about anybody else, but for me, this amp presents a lot of new, clever control mechanisms. Right about the time I think I have a handle on setting gain, dc bias, and other such common tings, Nelson introduces level shifters, along with other clever topology manipulations. I am beginning to realize why ZM is always laughing. He has an idea how much Nelson knows and how little we all do.😀 Sorry, I meant to say how much I do.
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Hi Albert, 🙂
I mean in the pdf Nelson writes the "network R7, C2, P2......." but in the scheme it is R7, C2 and P1....
Of course this is not very important.......the same happens with P1, C2 and R6.
🙂
I mean in the pdf Nelson writes the "network R7, C2, P2......." but in the scheme it is R7, C2 and P1....
Of course this is not very important.......the same happens with P1, C2 and R6.
🙂
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I'm still dumber than ya ( all )
Only those who know they are dumb are wise.
I am very unwise myself.
naah ..... that's sissy attempt of yours
I'm still dumber than ya ( all )
Smart enough to go to BURNING AMP!😱
Can this clever control mechanism (P3) be used on a differential pair with similar effectivieness on outcome?
it depends how tail is long 
longer pair - less influence of halves dissimilarity
shorter tail - more influence of halves dissimilarity
without considering all pro et contra
longer pair - less influence of halves dissimilarity
shorter tail - more influence of halves dissimilarity
without considering all pro et contra
So it plays directly off the dissimilarity of the N vs P and would not really do much for like minded friends other than trim offset or unequal sharing. I guess i was thinking in terms of its use in a SUSY setup, as if i am anywhere near that concept.
with that trimpot you're playing with xconductance of input jfets , changing their respective amplification factor ;
more local (source) degeneration means that that halve is lazier ;
anyway - by virtue - proper LTP ( if you meant on that saying differential pair ) will trying to null difference between halves , considering xconductance (beta (conditionally) if bjt ) and all related characteristic factors .
especially when you enclose SUSY around that ( or any ) stage , differences will be nulled in even greater amount . that's exactly what SUSY does and why is invented
.........
so - back to books - dream more about SUSY .......
in a moment when you grasp it's elegance , you'll realize how knowing is much more joyful than just having it made
more local (source) degeneration means that that halve is lazier ;
anyway - by virtue - proper LTP ( if you meant on that saying differential pair ) will trying to null difference between halves , considering xconductance (beta (conditionally) if bjt ) and all related characteristic factors .
especially when you enclose SUSY around that ( or any ) stage , differences will be nulled in even greater amount . that's exactly what SUSY does and why is invented
......... so - back to books - dream more about SUSY .......
in a moment when you grasp it's elegance , you'll realize how knowing is much more joyful than just having it made
so - back to books - dream more about SUSY .......
in a moment when you grasp it's elegance , you'll realize how knowing is much more joyful than just having it made
This is very true. The understanding is indeed more valuable than the product of it. I also enjoy the acceptance of not understanding...at least these past few months😀 Juma's F5 should be singing to me tonight
ZM...... just an observation. Your knowledge of "things audio" deserves an official FUGLY..... The rennaissance man you are, the forum just wouldn't be the same without you.....😀
I know that ZM is not a person, it is a consortium 
..... That is the reason why he can be everywhere......,
😀
..... That is the reason why he can be everywhere......,😀
