oh yes 🙂
didn't I already explained (maybe even twice) how's that optothingie functioning?
well, at least in ZMEngrish?
didn't I already explained (maybe even twice) how's that optothingie functioning?
well, at least in ZMEngrish?
they are here ...... D3 being in same place , still , working same duty in both Babelfish M25 and SissySIT - preventing lower gate to wrap around output node in positive clipping for more than one diode drop voltage
in case of Babelfish M25 and M2 , D1 and D2 are doing same thing , for negative clipping - preventing upper gate to wrap around output node for more than 2 diode drop voltages
however , in SissySIT , upper gate is already bellow output node , so leaving D1 and D2 here is Big NoNo , they will conduct pronto , so bye with any function of ....anything
so ,fro SissySIT, toss out D1 and D2 , introduce D4 and D5 , and they'll prevent upper gate to wrap around neg rail for more than 2 diode drop voltages
simple , isn't it ?
🙂
also observe difference in orientation of ZD1, SissySIT vs. Babelfish M25
in case of Babelfish M25 and M2 , D1 and D2 are doing same thing , for negative clipping - preventing upper gate to wrap around output node for more than 2 diode drop voltages
however , in SissySIT , upper gate is already bellow output node , so leaving D1 and D2 here is Big NoNo , they will conduct pronto , so bye with any function of ....anything
so ,fro SissySIT, toss out D1 and D2 , introduce D4 and D5 , and they'll prevent upper gate to wrap around neg rail for more than 2 diode drop voltages
simple , isn't it ?
🙂
also observe difference in orientation of ZD1, SissySIT vs. Babelfish M25
Thank you, for the answer in your time you need to go to sleep for the hiking. 🙂
This dumb brain will try to catch what you explain.😀
This dumb brain will try to catch what you explain.😀
it's simple ....... just imagine what's happening when dumb or drunk operator turns preamp volume control few full circles , then some
input buffer goes Berserk , autoformer is even multiplying that berserk , while gates of output devices are trying to reach both roof and cellar ..........
in same time , PSU rails are much lower than roof and much higher than cellar , and sources are simply unable to leave window between two rails
so , something must be there to prevent gates to go out of building
🙂
input buffer goes Berserk , autoformer is even multiplying that berserk , while gates of output devices are trying to reach both roof and cellar ..........
in same time , PSU rails are much lower than roof and much higher than cellar , and sources are simply unable to leave window between two rails
so , something must be there to prevent gates to go out of building
🙂
Yes, I think I am learning the protection needs the hard way now.. 🙁
I did not use the zener at all and paying the price.
Maybe things from tube build where this kind of protection is not used.
I did not use the zener at all and paying the price.
Maybe things from tube build where this kind of protection is not used.
ZM, how low could one let go Iq, lets say not having Berserker but more a Sissy SissySIT? Have very sensitive speakers (100db) and can't radiate 170 Watt in my living room environment BUT I am highly interested in the SIT sound. Any chance for that or is ist the wrong amp to do such a thing?
Cheers
Ernst
Cheers
Ernst
wouldn't go bellow 22V5dc rails
Iq , say that with 1A
pretty much sure that gate voltage window will still suffice with space for opto bjt
Iq , say that with 1A
pretty much sure that gate voltage window will still suffice with space for opto bjt
Sissi SissySIT
Ok, great - thanks! So I'll probably order one 🙂 Will send you an email.
Cheers
Ernst
Ok, great - thanks! So I'll probably order one 🙂 Will send you an email.
Cheers
Ernst
As the self-proclaimed Master Sissy, are you also working on the third version of the Dictionary of the Khazars (the Sissy one)?
😀
😀
naah , not funny enough
I'm more for Lord of the Light perception of the reality , when in darker mood
when normal , everything solvable with Towel , or spare one
🙂
I'm more for Lord of the Light perception of the reality , when in darker mood
when normal , everything solvable with Towel , or spare one
🙂
Hello ZM,
I have the Tonkin 2sk182E and was wondering if I could use it with the SissySIT? If so, what would need to be changed? Thank you!
Bao
I have the Tonkin 2sk182E and was wondering if I could use it with the SissySIT? If so, what would need to be changed? Thank you!
Bao
I confused 2SK182 for THF-51 and later I found that I was listening to 2SK182 (with IRFP9240, Iq 1.3A Supply 28V). 🙂
So they are workable in SissySIT circuit which is flexible enough I believe, why not?
Sound is ... almost the same to my dumb ears.
So they are workable in SissySIT circuit which is flexible enough I believe, why not?
Sound is ... almost the same to my dumb ears.
according to your table , no go ..... no certain voltage window to squeeze opto bjt in
gate to gate is different , so other solutions already shown in Most Greedy Boy, of them all... or (there is no) DEFiSIT of Papa's Koans are viable
of course , one can be sure only after testing exact 2SK182 specimens under prescribed conditions - rails 22 to 25V and Iq 1A8 to 2A
gate to gate is different , so other solutions already shown in Most Greedy Boy, of them all... or (there is no) DEFiSIT of Papa's Koans are viable
of course , one can be sure only after testing exact 2SK182 specimens under prescribed conditions - rails 22 to 25V and Iq 1A8 to 2A
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