Marantz CD63 & CD67 mods list - Page 1789 - diyAudio
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Old 24th January 2012, 09:17 AM   #17881
UV101 is offline UV101  England
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For the sake of a few pence, you should replace them all!!! I cam also recommend replacing the caps in the filter section with styrene or maybe even smt pps could be an option. See post 1 for rays list. The filter mods are a definite worthwhile if you plan to retain an opamp output stage.
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Old 24th January 2012, 09:20 AM   #17882
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Exactly, they're cheap mods to do so a no-brainer. The audibility is quite small in absolute terms but the value is good. Good mods to wet your feet if you're not confident with the big ones ie. regs, power supplies, clocks, output stage.
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Old 24th January 2012, 08:30 PM   #17883
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Quote:
Originally Posted by UV101 View Post
If you can do without the on/off switch Ben, you can fit a large transformer behind the transport, that way you could leave the original TX in situ?

Click the image to open in full size.
Hi guys, i have been sticking the trafos on the back panel, it is getting really crowded. The last one to do for now is trafo for the servo. BTW-is the DOS upgrade is much better than the op-amp- LMA49720?.
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Old 25th January 2012, 10:09 AM   #17884
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The Dos upgrade is only better if you feed it with low noise regs etc. If not the sound is compromised.

Brent
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Old 25th January 2012, 10:22 AM   #17885
SimontY is offline SimontY  United Kingdom
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The DOS is what Russ Andrews would call a musicality upgrade, rather than a fidelity upgrade. I'd agree. Clocking, regs and servo work are more important.
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Old 25th January 2012, 10:43 AM   #17886
UV101 is offline UV101  England
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Quote:
Originally Posted by Fidelity Audio View Post
The Dos upgrade is only better if you feed it with low noise regs etc. If not the sound is compromised.

Brent
and if you use the right components in the build!!!!
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Old 25th January 2012, 10:53 AM   #17887
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Well yeah that goes without saying ;-)

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Old 25th January 2012, 08:32 PM   #17888
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Thanks guys, well then i will go for the servo mods first then ,may be DOS later.
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Old 27th January 2012, 09:16 AM   #17889
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I just finished fitting a 50VA 2x12VAC Nuvotem servo toroid behind the tray in my player. I had no problem fitting it in there. I left the KI tx in for now because I don't have the dropper resistor for the display. The good news is that it works and hasn't set on fire yet.
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Old 27th January 2012, 12:42 PM   #17890
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Thanks for your replies about the filter section. I'm building the DOS board and I just ordered a pair of mundorf output caps and two super regulators. The whole idea is to make the DOS the output stage of my behringer SRC2496 and I'm almost there. I hope the results are good after all the effort. I'll post some pictures when I'm done.
Ben: Good news you managed to fit the tx, I'm curious to hear your improvements soundwise.
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