Marantz CD63 & CD67 mods list

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#10,021
Quite a long thread

I just wanted to say thank you to you guys and I'm sure there are hundreds like me. About a year ago I started thinking about my 63KI player ageing and sounding very limited compared with half-decent vinyl and stumbled across this huge source of knowledge. With info from you guys and a little (!) soldering help from a friend, and a budget of not much more than £200, the player is transformed and plays music
in a way that sounds like the mastertape. For me, it doesn't get better than that.

So thank you all and Congratulations

A Quite Extraordinary Achievement
 
#10,024
rowemeister said:
I would use 2x 220uF BG minimum but 2X 470uF BG is fine.
Click to expand...
Hi Brent

I am now building a dedicated psu for the dac.

I will use one BHC 10.000uF for smoothing dac analog after the schottkys. Should I bypass this cap with a 100nF plastic ?

Another question... The 15VA 2x9v TX I am using is quite big... Can I place it near the output opamps ? I am afraid it might cause hum problems.

Regards

Ricardo
 
#10,025
Re: Quite a long thread

avr300 said:
Congrats also from here. It has been a pleasure and fun to participate.

Let's push it and get the 0.5M views.
Click to expand...

micky127 said:
I just wanted to say thank you to you guys and I'm sure there are hundreds like me. About a year ago I started thinking about my 63KI player ageing and sounding very limited compared with half-decent vinyl and stumbled across this huge source of knowledge. With info from you guys and a little (!) soldering help from a friend, and a budget of not much more than £200, the player is transformed and plays music in a way that sounds like the mastertape. For me, it doesn't get better than that.

So thank you all and Congratulations

A Quite Extraordinary Achievement
Click to expand...

RCruz said:
Now you are there...!!!

Thank you Ray for the unconditional support.

Regards

Ricardo
Click to expand...

Thanks guys, it's great to hear that you appreciate it.

B.T.W. the colleague i'm helping to modify a player: we plugged it in today, only one exploding cap! 😀 Not bad for a first timer! It scared him to death though... :clown:

Ray
 
#10,026
RCruz said:

Hi Brent

I am now building a dedicated psu for the dac.

I will use one BHC 10.000uF for smoothing dac analog after the schottkys. Should I bypass this cap with a 100nF plastic ?

Another question... The 15VA 2x9v TX I am using is quite big... Can I place it near the output opamps ? I am afraid it might cause hum problems.

Regards

Ricardo
Click to expand...

I wouldn't bother with the 100nF.

The TX should not cause hum

Brent
 
#10,028
Re: Re: Quite a long thread

6h5c said:
B.T.W. the colleague i'm helping to modify a player: we plugged it in today, only one exploding cap! 😀 Not bad for a first timer! It scared him to death though... :clown:
Click to expand...
Hi Ray

I had a similar experience the first time I built my Steimusic Philips CDP.

The cap was on reversed polarity :hot:

Now it plays wonderfully.

Ricardo
 
#10,030
The digital caps should work ok. I'm not a big fan of small bypass caps but the 10uF would be fine. I prefer to keep it all simple but this also means you need good quality parts to start with. Eg I would never bypass a BG and would not use bypassing when using good regs.

If you are putting the tx over the opamps I would (just in case) put a shield between and of course connect this to gnd.

Brent
 
#10,032
Re: Re: Re: Quite a long thread

rowemeister said:
Haha a great way to introduce him to electronics.😀

Brent
Click to expand...

RCruz said:
Hi Ray

I had a similar experience the first time I built my Steimusic Philips CDP.

The cap was on reversed polarity :hot:

Now it plays wonderfully.

Ricardo
Click to expand...

Yes, it was a learning experience 😀. The cap was on the -10V and he connected it with minus to GND... :shhh:

Ray
 
#10,033
Re: Re: Re: Re: Quite a long thread

6h5c said:




Yes, it was a learning experience 😀. The cap was on the -10V and he connected it with minus to GND... :shhh:
Click to expand...
Reversed polarity is quite a common mistake.

As my work involves using a PC 12 hours a day, my eyes are not perfect anymore so....

My CD worked for two hours and I always heard a little frying noise that I could not identify... then crack and the cap it started to leak.....
Some cleaning a a new cap solved the problem..:angel:
 
#10,035
rowemeister said:


If you are putting the tx over the opamps I would (just in case) put a shield between and of course connect this to gnd.
Click to expand...
I am thinking I must place the 2x9v TX outside. (Leaving it inside would take the place needed for the future discreet output stage)

I can fasten it to the back plate (outside near the stock TX) and pull the wires in through a hole...

Should I expect any problems from that setup ?

Regards

Ricardo
 
#10,040
Malefoda said:
No clock yet?? Bad boy!
Click to expand...

I did cut the earth loop "acoustica.org.uk" and things god a lot better.

Afet all my experiments, I believe this machine needs two clocks:

One for the DAC to optimyse timing, spatial presentation and overall sound cohesion.

And one for the servo where we get detail, dynamics and insight.

I am saving €€€€ right now

By the way, I love your integrated... I am wondering if the power amp G&W Class A is as good or better.... Do you know this big brother ?

Ricardo
 
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