Marantz CD63 & CD67 mods list

[Fidelity Audio]

Lucky boy .. to have all that nice test equipment !


Of course, you have a psu dedicated to the chip with star earth connection ?

I will use the PSU I made for the other clock to supply a 5v reg for chip and then maybe use a Audiocom reg later.

I will also be using coax

Brent

 

[gy21]

Short question.

what do resistors R657/658 (100R) near the output rca do?

 

[Fidelity Audio]

Short question.

what do resistors R657/658 (100R) near the output rca do?

R657 and R659 make a potential divider and the muting transistor switches this point to gnd.

Brent

 

[poynton]

R657 and R659 make a potential divider and the muting transistor switches this point to gnd.

Brent

Or if you have removed the muting transistors [ of course you have ] NOTHING except increase the output impedance. They can be removed and shorted.

 

[gy21]

Or if you have removed the muting transistors [ of course you have ] NOTHING except increase the output impedance. They can be removed and shorted.

thanks guys.

Yes ofcourse I have removed the muting trannies , yesterday I lowered the R659/660 to 22r to lower the output impedance and that's why R657/658 came in mind.

So by shortening these out I will lower the out put impedance even more

 

[Fidelity Audio]

Whoooooo

This servo clock is sooo goooood. The detail is amazing. I cant believe how good it sounds.

Its probably brought greater clarity and detail than the DAC clock.

I have done a few servo mods over the last month or two and I can honestly say the improvements have been some of the best.

Ill post some pics soon and will also do a full test over the weekend.

Brent

 

[poynton]

Whoooooo

This servo clock is sooo goooood. The detail is amazing. I cant believe how good it sounds.

Its probably brought greater clarity and detail than the DAC clock.

I have done a few servo mods over the last month or two and I can honestly say the improvements have been some of the best.

Ill post some pics soon and will also do a full test over the weekend.

Brent

Hi.

Where did you take the feed for the divider from?

Where did you feed it?

Andy

 

[Fidelity Audio]

Hi.

Where did you take the feed for the divider from?

Where did you feed it?

Andy

I used my 15V PSU (that feeds the audiocom reg that feeds the clock).

It is also gnd to star.

I fed it to XT1 on servo (pin 19) using the 1 meg resistor hole.

Brent

 

[poynton]

Hi.

Where did you take the feed for the divider from?

Where did you feed it?

Andy

Hi.
Thanks Brent.

I meant the signal feed. Did you buffer it or was it a direct feed from the clock?

Andy

 

[Fidelity Audio]

Hi.
Thanks Brent.

I meant the signal feed. Did you buffer it or was it a direct feed from the clock?

Andy

Direct feed.

I spoke to Audiocom and they said a direct feed would be ok.

Brent

 

[Fidelity Audio]

Another update.

The bass is superb much lower and deeper than before.

Kralls voice is even clearer than before too.

Brent

 

[Fidelity Audio]

Here is a little pic. I will tidy up the cables etc but this is pretty much it.

 

[Dr.Gone]

Here is a little pic. I will tidy up the cables etc but this is pretty much it.

That's sum tweaked player. How long does it take to take the player apart for a mod?

Regards,
Jacco

 

[Fidelity Audio]

That's sum tweaked player. How long does it take to take the player apart for a mod?

Regards,
Jacco

Its not to bad. About 5 mins max. Everything comes away! Just!

Brent

 

[6h5c]

Whoooooo
This servo clock is sooo goooood. The detail is amazing. I cant believe how good it sounds.
Its probably brought greater clarity and detail than the DAC clock.
I have done a few servo mods over the last month or two and I can honestly say the improvements have been some of the best.
Ill post some pics soon and will also do a full test over the weekend.

Brent

Hey Brent,

Nice work!
Pity I don't have a separate servo in my 67 to try it
Remarkable improvement in sound. Probably the use of coax has something to do with that too.
It gets rid of a lot of radiated HF.

Regards,

Ray.

 

[Gooch]

Ok I have installed my clock card and the power supply for it. I have to say that this was a major upgrade. The vocals came a live the bass tighter up nice sparkle to the highs. Things should even get better after there’s some burn in. Well next up is to replace the resistors and caps around the opamps then add regs for the +12/-12vdc.
Here are some pictures.

Regards
Dave

An externally hosted image should be here but it was not working when we last tested it.

An externally hosted image should be here but it was not working when we last tested it.

 

[Fidelity Audio]

Ok I have installed my clock card and the power supply for it. I have to say that this was a major upgrade. The vocals came a live the bass tighter up nice sparkle to the highs. Things should even get better after there’s some burn in. Well next up is to replace the resistors and caps around the opamps then add regs for the +12/-12vdc.
Here are some pictures.

Regards
Dave

An externally hosted image should be here but it was not working when we last tested it.

An externally hosted image should be here but it was not working when we last tested it.

Nice work Dave.

That blue TX is the same as the Nuvotem ones I use

Brent

 

[Gooch]

Thanks Brent
Nice work on the servo clock I hope you will be adding that to your mod list
Maybe a schematic


Regards

Dave

 

[SimontY]

Crikey Brent, who'd have thought?! lol. Is it easy to implement for a n00b like me? What's next?! lol

Simon

 

[SimontY]

Hi Simon,

What kind of feet do you suggest to replace the original ones. and the bitum, that is the kind you can buy in a carshop?

Rein.

Hi Rein,

What Andy suggests sounds like a good, cheap idea. I can only recommend what I've tried (and found very musical), which is Russ Andrews' Oak Cone Feet. These give a laid back sound with big bass and good imaging (compared to stock on an MDF rack).

Simon