Marantz CD63 & CD67 mods list

[higlander]

Ben@: Just wonder if you have fitted the relay operated muting circuit ?

[Ben Hanke]

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.

[higlander]

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.

[hotiron]

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.

[Chivvyp]

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

[hotiron]

You can get a tube of silicon for £3 at B&Q it goes a long way and works.

[higlander]

Originally Posted by Chivvyp

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

[higlander]

Originally Posted by hotiron

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.

[RCruz]

Originally Posted by higlander

Try this :
CAR VAN VEHICLE SOUND DEADENING PROOFING PADS SHEETS 10 | eBay

That is what I use.... way cool and effective

[UV101]

Originally Posted by RCruz

That is what I use.... way cool and effective

+1 that's the same stuff I use