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Old 20th February 2009, 08:55 PM   #1
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Default Accuphase C-27

Hi,
here (link goes to accuphase document) is an add for accuphase's new standalone phono amp.
Included is - partly - the schematic of the piece. At least the MM-twig is quiet unusual -- the input is buffered with fet's -- for the feedback path as well.
What would they hope to achieve -- is it for DC-freeness only?

Rüdiger
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Old 24th February 2009, 09:03 PM   #2
MRupp is offline MRupp  Germany
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Very interesting amplifier, though it seems it has not drawn much attention so far. It is reviewed in the current issue of "image hifi" but I have not read the article yet. Anyway, I think it is very "generous" of Accuphase to publish the basic schematics

It immediately reminded me of some designs I had seen before, and low and behold, it has some striking similarities to the first stage of the phono amp that PigletsDad presented some time ago.: http://www.diyaudio.com/forums/showt...96#post1393696

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-- the input is buffered with fet's .... What would they hope to achieve --
Higher input impedance for MM cartridges (I think it even mentions this in their text).
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Old 24th February 2009, 09:42 PM   #3
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Knock yourself out
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Old 24th February 2009, 09:56 PM   #4
Zen Mod is offline Zen Mod  Serbia
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Quote:
Originally posted by MRupp
..... it has some striking similarities to the first stage of the phono amp that PigletsDad presented some time ago.: http://www.diyaudio.com/forums/showt...96#post1393696
.....

Papa Borbely's DH101 line stage ?
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Old 25th February 2009, 04:27 PM   #5
MRupp is offline MRupp  Germany
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Quote:
Knock yourself out
Thanks, at least I can figure some resistor values and a few other details now.



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Papa Borbely's DH101 line stage ?
I have his articles from his WEB pages but can't identify this particular line stage ?
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