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Official M2 schematic
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Old 27th October 2015, 06:39 PM   #121
generg is offline generg  Germany
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Don' t take me in in the plea, too much punishment for him....
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Old 27th October 2015, 06:43 PM   #122
WalterW is offline WalterW  Netherlands
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Official M2 schematic
Quote:
Originally Posted by Zen Mod View Post
let me paraphrase what I already wrote ( as answer to same question ) on Baby DiyA :

consider that we have rails of +/-22Vdc

that means (not counting losses precisely) that we have 44Vpp envelope for output swing

amp's gain is 5V/V (autoformer ratio)

so , for full blast on output we need 44Vpp/50= 8.8Vpp at input

that's 8.8/2/1.41= 3.11Vrms

so , if there is any idiot available ( and believe me , it always is ) , he certainly will bang full blast of something into amp's input

in that case , output node (point where diodes are connected ) will try to go both to roof and cellar , resulting in heavy clipping and most probably even more damage

so , just imagine effect of clamping diodes (D1-D2-D3) - they are clamping output node to rails , limiting max . signal amplitude
NB that output node is in strong correlation with mosfet gates , so clamping of outout is in fact achieved with gate clamping

Q6 and Q7 are there to maintain no more than 1V25 across corresponding resistors , saving LED from nasty peaks and maintaining smooth biasing

btw. did you put second schematic , framed , on the wall ?
Thanks ZM ! Now I understand. No just pictures of precious VFETs on the wall
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Old 27th October 2015, 07:02 PM   #123
generg is offline generg  Germany
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Official M2 schematic
i was deeply impressed by these lines in Tone Audio December 2010 from Jeff Dorgey:

"Removing the $60,000 pair of Burmester 911 mk. 3 monoblocks in my reference system, the M2 held its own, with even slightly more inner detail than the German monster amps. This amplifier was able to take hold of the GamuT S9’s with enough control that a few casual visitors didn’t even know the Burmester amplifiers were no longer in the system!"
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Old 27th October 2015, 07:55 PM   #124
Danger Mouse is offline Danger Mouse  Germany
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My German dealer says:
the WSM Series should be the equal to the PC Series a Little bit more wattage.
I want to use the WSM Series but im a Little bit concerned that it will vary to much from the PC Series.
Have someone a little bit experience with this transformers?
And can say somthing about it.

thanks Alex
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Old 27th October 2015, 08:07 PM   #125
2 picoDumbs is offline 2 picoDumbs  Australia
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Quote:
Originally Posted by Danger Mouse View Post
My German dealer says:
the WSM Series should be the equal to the PC Series a Little bit more wattage.
I want to use the WSM Series but im a Little bit concerned that it will vary to much from the PC Series.
Have someone a little bit experience with this transformers?
And can say somthing about it.

thanks Alex
They are cheap. Buy both put one of each in separate channels, test which is best.
Job done.
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Old 27th October 2015, 08:12 PM   #126
2 picoDumbs is offline 2 picoDumbs  Australia
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Quote:
Originally Posted by Zen Mod View Post


extremely dangerous one (Shark)

edit:

as countermeasure/punishment , I'm going to suspend my constant adoption plea for at least 6 months

The real punishment is that Papa decided to adopt me instead. Adoption papers are being signed right now.
Hahaha
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Old 27th October 2015, 08:15 PM   #127
generg is offline generg  Germany
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Official M2 schematic
Quote:
Originally Posted by Danger Mouse View Post
My German dealer says:
the WSM Series should be the equal to the PC Series a Little bit more wattage.
I want to use the WSM Series but im a Little bit concerned that it will vary to much from the PC Series.
Have someone a little bit experience with this transformers?
And can say somthing about it.

thanks Alex
I think it's one is the right one, choose 600:15k.

https://www.edcorusa.com/pc_series

The German dealer is more expensive and doesn't have all types.
But even ordering in the States you have to wait 6 weeks for production.

I did.....:-)

Look at the price!
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Old 27th October 2015, 08:38 PM   #128
nr12 is offline nr12  Germany
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Quote:
Originally Posted by Danger Mouse View Post
My German dealer says:
[...]
thanks Alex
Can you tell me, where I can get those in germany?

Thanks,

Ulf
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Old 27th October 2015, 08:52 PM   #129
generg is offline generg  Germany
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from me… :-)

if you don't like me here…

https://www.don-audio.com/Neu-Edcor-...opa-Vertrieb-1

but they don't have them available….

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Old 27th October 2015, 10:12 PM   #130
generg is offline generg  Germany
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Are all the diodes and the LMs a bit necessary because we have no feedback loop?

Or are they luxury?
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