Marantz CD63 & CD67 mods list - Page 1908 - diyAudio
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Old 22nd February 2013, 06:56 PM   #19071
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Ben@: Just wonder if you have fitted the relay operated muting circuit ?
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Old 24th February 2013, 03:16 AM   #19072
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Not yet... The relay was inexpensive, but I understand I'll also need some good film caps. Those will have to wait a while. My car wants parts too.
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Old 2nd March 2013, 07:33 PM   #19073
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Default Another CD63 mod

Surprisingly there have not been a lot of discussions in this forum for a number of days .

To add something to this page let me say that I have just completed 90% of modding work on my friend’s CD63 (I have promised him to carry out the modification before X’mas ). The only outstanding work now is to add a low jitter clock to the servo and the decoder. I have just purchased one in the eBay and it should arrive in a week or two.

For this CD63 I swapped the stock transformer with my spare toroidal transformer from my KI. As my friend will normally use this CD63 as a transport so I did not add a lot of enhancement to the analogue section. I just changed the smoothing caps (Panasonic TSUP and FC) and changed a lot of critical caps in the circuit. I have also changed the opamp with 4652HA. To improve the transport performance I add a 50VA 2X12V toroidal transformer to drive the servo section. I also add a relay operated muting circuit and replaced the 5V regulator 7805 with a low noise regulator to supply low noise stable voltage. As my friend has limited budget so I did not use top of the grade components or individual regulators but the SQ from this unit (without the low jitter clock at the moment) is very good indeed.

I will provide update when the clock is added.
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Old 2nd March 2013, 11:25 PM   #19074
hotiron is offline hotiron  Scotland
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I would be inclined to give the processor and front panel their own 5V regulator, use the one you pulled from the board. If you must use these long wires to the smoothing caps, rectification should take place at the caps else you get charging spikes on the wires, which is not good.
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Old 3rd March 2013, 01:15 PM   #19075
Chivvyp is offline Chivvyp  United Kingdom
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Default Case damping

Hi,

What's good stuff to use for case damping nowadays, and where do you get it from in UK?

Up until now I've been using Brown Bread which I got a roll of years ago but it's run out and I can't find it anymore.

The first KI that I sent off to be modded came back with a cork floor tile glued to the inside of the lid which seems a good cheap solution if nothing else.

Regards

Pete
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Old 3rd March 2013, 01:44 PM   #19076
hotiron is offline hotiron  Scotland
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You can get a tube of silicon for £3 at B&Q it goes a long way and works.
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Old 3rd March 2013, 04:23 PM   #19077
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Originally Posted by Chivvyp View Post
Hi,

What's good stuff to use for case damping nowadays, and where do you get it from in UK?

Pete
Try this :
CAR VAN VEHICLE SOUND DEADENING PROOFING PADS SHEETS 10 | eBay
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Old 3rd March 2013, 04:25 PM   #19078
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Originally Posted by hotiron View Post
I would be inclined to give the processor and front panel their own 5V regulator, use the one you pulled from the board. If you must use these long wires to the smoothing caps, rectification should take place at the caps else you get charging spikes on the wires, which is not good.
I think the front panel uses 18V and not 5V through the 7818 regulator.
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Old 3rd March 2013, 04:42 PM   #19079
RCruz is offline RCruz  Switzerland
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That is what I use.... way cool and effective
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Old 4th March 2013, 05:48 AM   #19080
UV101 is offline UV101  England
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That is what I use.... way cool and effective
+1 that's the same stuff I use
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