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Old 7th August 2011, 10:37 PM   #1
Cobra2 is offline Cobra2  Norway
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Default Please help identify AN PCB

I was told ths was an old RIAA circuit from Audio Note...but they(AN) will not supply schematic.
I would love if anybody cold help with more information...

Arne K
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Old 7th August 2011, 10:40 PM   #2
Cobra2 is offline Cobra2  Norway
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Another picture:
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Old 7th August 2011, 10:43 PM   #3
Cobra2 is offline Cobra2  Norway
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Old 8th August 2011, 08:59 PM   #4
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This thing is odd. Not likely an RIAA (I cant see the deempahsis parts). You have 2 tube sockets (not necessaryly for tubes though) and 3 xformers, 4th one bridged out. The size of the xformers indicates that they are propably input transformers. What is the part# on the TO220 on wires?
All in all, there are such few parts that Mr. Retroengineer should be able to tell you in an hour! E
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Old 8th August 2011, 09:55 PM   #5
limono is offline limono  United States
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It is most likely transformer I/V and Srpp output stage for production AN DAC or CD player. The same board and 4 transformers were used in costly Dac 4.1.
Regards, L
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Old 8th August 2011, 10:15 PM   #6
Cobra2 is offline Cobra2  Norway
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BD909
------------------
The answer from AN: (asked for model-no, info & schematic)
The board you have is an old phonostage, from a late 90s preamplifier.
Unfortunately we do not provide schematics for any of our products.
If I can be of further assistance, please let me know, we are always here to help.
Regards
M--- G----.
Audio Note (UK).
-----------------------
Arne K
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Old 9th August 2011, 12:02 AM   #7
Nanook is offline Nanook  Canada
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Default Cobra, take a close-up of the reverse side...

then maybe I could draw out a schematic for you.
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Old 9th August 2011, 02:59 PM   #8
limono is offline limono  United States
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It looks similar
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Old 9th August 2011, 04:42 PM   #9
kevinkr is offline kevinkr  United States
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RIAA EQ is LCR based as far as I can tell..
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Old 9th August 2011, 06:23 PM   #10
limono is offline limono  United States
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One stage (srpp) phono corrector??? I still think it's a dac output stage and AN rep sent you an incorrect info
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