Marantz CD63 & CD67 mods list

[adfinni]

Perhaps he should spend some of his loan on reading glasses and a 'mavis beacon' course !

Loan money is nearly depleted now after checking the balance. Reading glasses ????????? i have contacts, and what is a mavis beacon? lol im confused now.

Anyhow, my clock, psu, and op-amps are back in the new player, along with HDAM bypass and headphone circuit removal. Boy does this player sound sweet. I haven't had a proper listen as most people were in bed by the time i finished, but a bit of 'we are scientists' sounds gorgeous through my grados right this moment

ad

 

[rfbrw]

and what is a mavis beacon? lol im confused now.

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Typing for dummies.

 

[adfinni]

Typing for dummies.

O im insulted my typing skills are poor, being an engineering student, but i think i get my point across

 

[Fidelity Audio]

O im insulted my typing skills are poor, being an engineering student, but i think i get my point across

Earlier you put "im going to go fiddle with my supercock 2" LOL

Is the supercock a flat mate LMAO

 

[6h5c]

Hey, I was joking .......

Me too!

Ray.

 

[gy21]

Is it a good idea to replace all the output filter cap's by silver mica types?

 

[Fidelity Audio]

Is it a good idea to replace all the output filter cap's by silver mica types?

I found it helped bringing out the small details in the music and a little better channel seperation but I changed these at the same time as fitting 0.1% tol resistors.

I found changing silver mica caps all over helped alot especially with delicate treble.

Brent

 

[Fidelity Audio]

I have fitted my upgraded reg pcb for Servo , RF and HF.

Its now running and im listening to Diana Krall the girl in the other room cd.

Already the treble is tighter and more revealing with more 'air' to her vocals. Also the symbols are even more apparent than before.

It has a more 'Live' sound to the sound.

I'll post pics after lunch

Brent

 

[6h5c]

Is it a good idea to replace all the output filter cap's by silver mica types?

I found it helped bringing out the small details in the music and a little better channel seperation but I changed these at the same time as fitting 0.1% tol resistors.

I found changing silver mica caps all over helped alot especially with delicate treble.

I agree, changing the filter components to better parts with tighter tolerance is a good thing, especially around the first opamp after the DAC. It increases the symmetry of the filter and the cancellation of HF noise. You can also use 1% Polystyrenes (Styroflex) caps. I bought a few more than I needed and matched them as close as I could.

I'll post pics after lunch

Brent

Enjoy!

Ray.

 

[Fidelity Audio]

Here are the pics of my upgraged servo reg pcb.

Tight fit

 

[Fidelity Audio]

and...

 

[Fidelity Audio]

Here are the pics from my opamp decoupling and earth wires to star.

 

[Fidelity Audio]

also...

 

[Fidelity Audio]

and the star

 

[disco]

Re: Re: Serious testing...

I use the same cd for every listening test, this way I know exactly what gains (or losses) I have. I know the cd inside out. I use Diana Krall - The girl next door. I find this has sweet vocals and excellent varied bass and treble notes. Then ill test other cds with fast bass etc.

I can pick out certain notes or noises and always remember them, maybe i'm good at this with having been an audio engineer

Brent

I suppose one could train ones hearing for remembering small details. But can you remember these changes over a period of time, say one week?

Jaap

 

[disco]

Re: Re: Re: Serious testing...

brent
for bass, Herbie Hancock did an album and the double bass solo on it was incredable, perfect for testing lows.

I think it was a record (vynal), still trying to find it.
still looking.
allan

Many times good sounding vinyl albums get 'remastered' for digital. Probably because of the larger headroom on digital. I rarely found a remastering job worth the effort. Please try before buy

 

[Fidelity Audio]

Re: Re: Re: Serious testing...

I suppose one could train ones hearing for remembering small details. But can you remember these changes over a period of time, say one week?

Jaap

Yes very easily, 2 weeks would be pushing it though.

I have always worked with audio so I suppose I have got good at it.

Brent

 

[disco]

Re: FET output stage

Finally the parts I ordered arrived yesterday, so I could finish the player with the FET-stage i'm working on.
I built a new, serious version of the passive filter part, with 1% PS caps, precision resistors and matched inductors. I've just spent an hour listening to it. Wow. Guys, you really should try this.
The clarity, resolution, it's great. It beats the hell out of my opamp setup.

Thanks guys,

The filter part is very easy. Building the FET-stage using the HDAM lay-out is a bit tricky.
But it fits without cutting any traces .
I use some MKC output caps that I had, but I think i'm going to put in some Auricaps, or Reliable.

Maybe i'm even going to put those nice shiny metal cans back....

Ray.

Maybe it's worth the effort making one dedicated PCB, for both the FET-stage and the passive filter? I have the old acid tank standby...

Jaap

 

[disco]

Nah, this circuit deserves something better....
Really, it's worth the $$$ to invest in a good cap.

Ray.

Got some lovely all naturals laying around...

Jaap

 

[disco]

Lost it last night and came home with a VIRGIN

-- teeth were blinking till 7 AM --


Can't decide what mod to begin with, only one at the time unfortunately

Jaap