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Old 18th May 2011, 04:42 PM   #1
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Default Schematic Tube Analog Output Stage???

Help!Schematic tube output stage of CDP Audio Note AN-CD1(used DAC PCM 1710)....Help me!!!???
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Old 22nd July 2011, 05:44 PM   #2
pglusz is offline pglusz  Poland
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Default Schematic TubeStage AudioNote CD1

As requested.
What do you plan to change in this old CD?

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Old 22nd July 2011, 06:36 PM   #3
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I'd suggest rewiring the heater and using an ECC88 instead..
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Old 22nd July 2011, 08:38 PM   #4
kevinkr is offline kevinkr  United States
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Please note it is OK to post a hand drawn or redrawn CAD schematic of the AN CD1 circuitry, but it is not OK to post the original Audio Note schematic here without their express permission and an acknowledgment that such permission has been granted.
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Old 22nd July 2011, 08:48 PM   #5
pglusz is offline pglusz  Poland
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Dear kevinkr and all Colleagues,
This is absolutely NOT the original schematic or any part of it. I have drawn this myself in ...CorelDraw Essentials, based on the original AN board on hand.
I had never had the original schematic of AN CD1.
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Old 22nd July 2011, 09:31 PM   #6
pglusz is offline pglusz  Poland
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I also applied rewiring of heater supply for different tubes - 2 photos attached.

The schematic (not hand-made but CorelDraw-made...) with realised mods to power supply to DAC - attached. Please note, that the trafo is not "toroid" but "EI 40W" and it has also different heater windings than original, made by AN...

Good luck!
Attached Images
File Type: jpg 6.3V Switch for different tubes.jpg (155.7 KB, 301 views)
File Type: jpg 6.3V Switch for different tubes - bottom.jpg (181.8 KB, 281 views)
File Type: jpg Power Mod for Tube DAC_ANCD1.jpg (181.9 KB, 296 views)
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Old 10th August 2012, 12:41 PM   #7
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Hi all,

Sorry to ask as I am quite a noob in this area, but I think the lamp of my AN-CD1 just died.
And since I already heard it could be improved by using a different lamp, I wondered if I understood this post right? Replacing the 82 by the 88 would work, but requires a bit of additionnal wiring?

Thanks in advance

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Old 6th August 2014, 01:38 PM   #8
UnixMan is offline UnixMan  Europe
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Quote:
Originally Posted by gagagogo View Post
Sorry to ask as I am quite a noob in this area, but I think the lamp of my AN-CD1 just died.
And since I already heard it could be improved by using a different lamp,
way too late to answer... nevertheless, I'd suggest not to make any change to this great CDP, which is capable of a very nice and "natural" sound and excellent imaging.

As a tube replacement, I'd suggest a good NOS ECC82 or one of its close replacements, such as the 6189 (that I have used myself with very good results).
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