Accuphase C-27

Onvinyl · 20th February 2009, 09:55 PM

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

MRupp · 24th February 2009, 10:03 PM

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

Quote:

-- 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).

jacco vermeulen · 24th February 2009, 10:42 PM

Knock yourself out

Zen Mod · 24th February 2009, 10:56 PM

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 ?

MRupp · 25th February 2009, 05:27 PM

Quote:

Knock yourself out

Thanks, at least I can figure some resistor values and a few other details now.

Quote:

Papa Borbely's DH101 line stage ?

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

20th February 2009, 09:55 PM	#1
Onvinyl diyAudio Member Join Date: Aug 2002 Location: Germany	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 __________________ "I can feel what's going on inside a piece of electronic equipment. I have a sense that I know what's going on inside the transistors." Robert Moog

24th February 2009, 10:42 PM	#3
jacco vermeulen diyAudio Member Join Date: Oct 2004 Location: At the sea front, just under Rotterdam	Knock yourself out __________________ Looks like Sponge Bob has killed another thread.

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