Marantz CD63 & CD67 mods list - Page 1379 - diyAudio
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Old 30th December 2009, 08:47 AM   #13781
SimontY is offline SimontY  United Kingdom
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Never heard a CD-50, what do you know about this model?
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Old 30th December 2009, 08:52 AM   #13782
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It's a CD40 with variable ouput, same as CD60 wich have a second feature added, but the main PCB is all the same as some Philips (CD630 IIRC). It's just a CDM4 & TDA1541A (not R1 like the CD40, strange... R1 is higher spec... ). I guess it sounds the same. But right now nothing can beat my CD-43 wich sounds much cleaner with the melt cap at servo changed...
Matthieu
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Old 30th December 2009, 08:54 AM   #13783
SimontY is offline SimontY  United Kingdom
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Ahha, probably very much like my CD650 inside then! In that case it would need a lot of work to open the sound up.
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Old 30th December 2009, 09:06 AM   #13784
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Yep, nothing worth the 250€ asked
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Old 30th December 2009, 09:39 AM   #13785
poynton is offline poynton  United Kingdom
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Quote:
Originally Posted by Malefoda View Post
...............(not R1 like the CD40, strange... R1 is higher spec... ). ..........
R1 is a lower spec. check the data sheet.

Andy
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Old 30th December 2009, 11:35 AM   #13786
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Hi Andy,

Philips give better specs for it in its datasheet. Don't remember where it was on the Net but wasn't it a very older production batch but with slighlty better specs?

Matthieu
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Old 30th December 2009, 12:14 PM   #13787
SimontY is offline SimontY  United Kingdom
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Are you confusing it with N1? That was another variation that was said to be better. I have one of those and it did sound better than the one it replaced.
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Old 31st December 2009, 09:45 PM   #13788
Glenn2 is offline Glenn2  United Kingdom
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Quote:
Originally Posted by studiostevus View Post
Guys, I'm about to insert some 7909/7809's at the TCA0372's.
Why 7809/7909? If you are using a separate transformer then fair enough.
Series regulators (apart from low drop-out or 'LDO' ones) need 2V-3V overhead to actually regulate, at these currents. See the data sheets.

If you must use fixed regs, use 7808/7908. The input voltage is not really high enough to use 9V regulators. 8V is borderline and they'll drop out of regulation when spinning up, etc., but should be OK when playing. When they drop out due to not enough overhead, the output voltage will dip below the regualted value.

Best is to use LM317/337 and set them to 7-7.5V.

Guess who has to work on new year's eve...
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Old 31st December 2009, 10:52 PM   #13789
RCruz is offline RCruz  Switzerland
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Hi Glenn

Your post finally removed my doubts about regulating the servos......

You are very lucky to have work.... even if it happens to be during this period...

Happy New Year
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Old 31st December 2009, 10:58 PM   #13790
poynton is offline poynton  United Kingdom
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.....

Guess who has to work on new year's eve...
You're not alone !!


Andy

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