Always been that way. The old donut thread is starting to kick up dust. I think folks are really missing something special
if that's the case , folks are either desperate , or ungrateful , or too materialistic , or all of these un pocco ........ or none of the above
yukyukyank - last year didn't bring 'nuff from FW ?
in fact - it's always like that ....... each new one is inducing sooo much noise , but maybe just 5% of intended builds were really finished ......
yukyukyank - last year didn't bring 'nuff from FW ?
in fact - it's always like that ....... each new one is inducing sooo much noise , but maybe just 5% of intended builds were really finished ......
I like desperate. Tend to be ungrateful.
Ill use any material to have fun😀
I also like SLCF, just thinkning about it in other situ's.
Donut is great for big DoDo like me. So much to learn from it. Gonna stare at that servo some. I think you intentionally made it complicated
Gonna meet 6L6 this weekend. Good times.
Ill use any material to have fun😀I also like SLCF, just thinkning about it in other situ's.
Donut is great for big DoDo like me. So much to learn from it. Gonna stare at that servo some. I think you intentionally made it complicated
Gonna meet 6L6 this weekend. Good times.
servo can't be simpler that it is
ok - resistor in it's tail , instead of CCS , but that's it
ya wanna some optocoupler based thingie , or OP based one ?
number of sensing and ref. resistors can't be smaller , everything else will just add , comparing to 2+2 small bjts
however - print F1 on one paper , CCS Donut on other one
observe
there are just tiny differences ......... small buffer on input ....... added cascode on small buffer ......... instead of resistor in buffer source put CCS .........
then put servo which will take care of Ub/2 at output , instead of simple trimpot , which is in F1
simple , in fact
even upper CCS-es are literally redrawn from F1 (say tnx to Widlar , not Pa or ZM)
btw. buffer operation is exactly the same as in ACA
ok - resistor in it's tail , instead of CCS , but that's it
ya wanna some optocoupler based thingie , or OP based one ?
number of sensing and ref. resistors can't be smaller , everything else will just add , comparing to 2+2 small bjts
however - print F1 on one paper , CCS Donut on other one
observe
there are just tiny differences ......... small buffer on input ....... added cascode on small buffer ......... instead of resistor in buffer source put CCS .........
then put servo which will take care of Ub/2 at output , instead of simple trimpot , which is in F1
simple , in fact
even upper CCS-es are literally redrawn from F1 (say tnx to Widlar , not Pa or ZM)
btw. buffer operation is exactly the same as in ACA
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OP?
so Q8 watches the output, but how does it affect offset. It is tied to mosfet LTP through q7, but that is universal to both sides and offset is about imbalance between sides. What is the mechanism by which it controls offset?
so Q8 watches the output, but how does it affect offset. It is tied to mosfet LTP through q7, but that is universal to both sides and offset is about imbalance between sides. What is the mechanism by which it controls offset?
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operational amplifier
ya know - that as triangle drawn thing ?
usually 8-legged bug ?
simplest OP is LTP
read this ( I know you'll pass if I recommend anything longer than article from Pass ) : http://www.firstwatt.com/pdf/art_diy_opamp.pdf
ya know - that as triangle drawn thing ?
usually 8-legged bug ?
simplest OP is LTP
read this ( I know you'll pass if I recommend anything longer than article from Pass ) : http://www.firstwatt.com/pdf/art_diy_opamp.pdf
be aware that you have two LTPs
one is servo .......... other one is amp core , itself
one of LTP virtues is that he's ( like OP , later historically) doing everything he could , to maintain same potential on both inputs
dumb we Dodos - why we are contemplating about Donuts - here ?
one is servo .......... other one is amp core , itself
one of LTP virtues is that he's ( like OP , later historically) doing everything he could , to maintain same potential on both inputs
dumb we Dodos - why we are contemplating about Donuts - here ?
speaking of your thread , nice thing will be to have exact sch of Funny ^6 attached , for reference , attached here
I have impression that even F6 original thread residents can be confused , easily .......
what's your time locally , just for my future reference - to know when I read your posts - are you just usually wakoo , or both wakoo and sleepy ?
I have impression that even F6 original thread residents can be confused , easily .......
what's your time locally , just for my future reference - to know when I read your posts - are you just usually wakoo , or both wakoo and sleepy ?
First post was 4:50, mornin time🙂 Kids have ruined my sleep habits. Now I wake ip thinking of donuts and such. Nobody interested, just confused by Funny thingie.
OK
while I'm remembering that my AR2 is 9h late , it seems you're ~7h late , comparing to Central Universe Time , which is where I am
while I'm remembering that my AR2 is 9h late , it seems you're ~7h late , comparing to Central Universe Time , which is where I am
http://www.diyaudio.com/forums/pass-labs/216616-f6-amplifier-359.html#post3347195
It doesn't work on Apple stuff for some reason.
Seems that point is, we are both always late
It doesn't work on Apple stuff for some reason.
Seems that point is, we are both always late
I hope you're referring that browser/board functions are scratching on Apple stuff , not amplifier itself
(I'm not late , now .... it's 11.00 at my place )
so - here it is , for reference , Funny Buzzzzzz's ^6 :
(I'm not late , now .... it's 11.00 at my place )
so - here it is , for reference , Funny Buzzzzzz's ^6 :
Meant me and AR are always late/behind ZM. Thanks for the repost of schematic. apparently Apple doesn't understand the amp either
listen first , numbers later
from already shown THD spectra , we already know what to expect , so I doubt there will be any surprise
from already shown THD spectra , we already know what to expect , so I doubt there will be any surprise
OK. You convniced me. Actually, I have setup tweaked now, so measurement only takes a second or two.
Side note. Do you think it is wiser to lower rails to 22V and raise bias to 1.5A or keep them at current 26V and 1.25A. In the end, Bias will be higher, but got to get some sinks ordered that will take the heat. My current layout would benefit from taller than cuurent, 6" sinks. I was thinking 8-10" single sided monoblocks. should i go this route or spread them out horizontally like Pass amps?
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