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Official M2 schematic
Official M2 schematic
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Old 25th October 2015, 09:32 AM   #11
crt is offline crt  Indonesia
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Thank you Papa
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Old 25th October 2015, 09:40 AM   #12
2 picoDumbs is offline 2 picoDumbs  Australia
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Quote:
Originally Posted by kacernator View Post
Still the same +- 25V.
The M2 is an Amp that runs off 22 to 24V rails
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Old 25th October 2015, 10:13 AM   #13
Zen Mod is online now Zen Mod  Serbia
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Official M2 schematic
Q6 and Q7 are LM385-1.2

D1,D2,D3 are 1N4148

Q5 4N35

yeah , stick it to the wall and enjoy sheer beauty
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File Type: jpg M2 with pinout by ZM.jpg (119.5 KB, 8107 views)
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Last edited by Zen Mod; 25th October 2015 at 10:17 AM.
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Old 25th October 2015, 10:49 AM   #14
2 picoDumbs is offline 2 picoDumbs  Australia
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Quote:
Originally Posted by Zen Mod View Post
Q6 and Q7 are LM385-1.2
So I got that part right then. Amazing.
Hahahaha
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Old 25th October 2015, 11:03 AM   #15
2 picoDumbs is offline 2 picoDumbs  Australia
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I'm thinking it might be beneficial to make R6 45k, assuming P1 sets DC Offset
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Old 25th October 2015, 11:22 AM   #16
stoN_Cold is offline stoN_Cold  Serbia
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Quote:
Originally Posted by kacernator View Post
Still the same +- 25V.
Thx.
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Old 25th October 2015, 11:34 AM   #17
Zen Mod is online now Zen Mod  Serbia
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Official M2 schematic
Quote:
Originally Posted by 2 picoDumbs View Post
I'm thinking it might be beneficial to make R6 45k, assuming P1 sets DC Offset
count on Ugs difference between N and P mosfets , for same current

however , as with all Papa's schematics - count on fact that he's usually taking parts from pre-selected drawers** , so changing any appropriate resistor (say for + or - 10%) if needed on the fly, is trivial thing to him

(one of) purpose(s) of all these schematics thrown on all of us in past few decades is pretty much the same - to same things became trivial to us , too

** he didn't said that , but logic dictates the same, for most cases ;
however , upon completing the amp , if output offset stubbornly stays negative , decrease R6 ; if it stays positive , decrease R7 ; I believe I needed 39K for one , but can't remember which ; even though I used FQP/FQN parts , Geschenk by my šlterer Bruder Generg
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Last edited by Zen Mod; 25th October 2015 at 11:41 AM.
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Old 25th October 2015, 11:36 AM   #18
h_a is offline h_a  Europe
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Amazing little circuit and very elegant!

Thanks Nelson!!
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Old 25th October 2015, 11:38 AM   #19
wdecho is offline wdecho  United States
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Official M2 schematic
Quote:
Originally Posted by Zen Mod View Post
Q6 and Q7 are LM385-1.2

D1,D2,D3 are 1N4148

Q5 4N35

yeah , stick it to the wall and enjoy sheer beauty
Thanks Zen, I was fixing to ask about the transistors and diodes. What does the red square around Q5 and diode refer to?

Edit, After googling the 4N35 I see it is a 6 pin Optocoupler. Disregard question.

Last edited by wdecho; 25th October 2015 at 11:51 AM.
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Old 25th October 2015, 11:43 AM   #20
2 picoDumbs is offline 2 picoDumbs  Australia
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Quote:
Originally Posted by wdecho View Post
Thanks Zen, I was fixing to ask about the transistors and diodes. What does the red square around Q5 and diode refer to?
Optocoupler device
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