Marantz CD63 & CD67 mods list

[Fidelity Audio]

Because you have a 67 get rid of the 2 main smoothing caps (Silmics 470uF) and replace with some 25V 22000uF Mundorf HC from Lee @ DIYHIFI. Check size first and if they are too big use some HC that do fit.

Brent

 

[SimontY]

Ah yes, the '67 has quite big caps there... about the only improvement they made.

 

[padman]

Thanks Brent

I think the mundorfs would be a lttle too far at this stage, so panas going in.

For round 2 i will attempt seperation of supplies plus some caps and likley finish with clock, reg and HDAM bypass.

My room is small and the systems not that great. Nad 114 and 214 hooked to kef55s.

Once the above has been done i will ***** and maybe go for a modded rega arm

 

[RCruz]

A good start. The DC blocking bypass is quite profound - and free!

What do you mean ?

Loose smoothing caps ?

 

[SimontY]

DC blocking / signal coupling caps at analogue output --> shorted out / removed.

 

[RCruz]

Thank you again Simon

 

[ccschua]

Hi Ricardo,

Follow the link further back on the page. There are some Chineese HDAM/Discrete OPAmps. They look fairly similar to Burson (not sure about design) Just wondered if anyone had heard them to compare to Burson.

http://www.diyaudio.com/forums/showthread.php?postid=1782270#post1782270

Ian

They are not the same. Check the circuit diagram of Bursons and the circuit diagram of this one.

http://www.audio-gd.com/enweb/pro/diy/OPA.htm

OPA Earth = HDAM (most neutral, OPA Earth has some improvement over HDAM, check the head-fi thread)
OPA Sun V2 = more dynamics, vocal more forward.

 

[Fidelity Audio]

Some splitting of hairs here!!

Also you forget the Bursons are V2 now with improved circuit layout and design and of course sound much better than before.

Brent

 

[stueyh]

Hi all,

Can I just check something about the coax mod; do I need to cut the U100 link and solder to it or is it left intact? I'm presuming R501 is left in place just lifted at the input end?

 

[stueyh]

I've answered my own question!

Mod done and what a difference! Equal to a new clock and PSU. It's opened the treble by quite a margin.

For those who are interest, I used the mini coax from Maplin.

 

[Malefoda]

Some splitting of hairs here!!

Also you forget the Bursons are V2 now with improved circuit layout and design and of course sound much better than before.

Brent

Stueyh, any link?

Brent, funny how the sayings are the same between floks ,) here we split the hair in quaters... anyway, according to your scale with LM4562 at 60%, HA@70, then discrete aop's difference are all about the 95 +/- 1% ? Then yes this is cut the hair...
Is a BMW faster in black or red? ( Brent, a Rotary engine is faster than BMW's trucks... )

Matthieu

 

[Fidelity Audio]

Black is quicker

Brent

 

[Fidelity Audio]

I've answered my own question!

Mod done and what a difference! Equal to a new clock and PSU. It's opened the treble by quite a margin.

For those who are interest, I used the mini coax from Maplin.

Excellent. Such a simple mod, one of the best due to the cost.

Brent

 

[stueyh]

Stueyh, any link?



Matthieu

For the coax do you mean? If so then yes: http://www.maplin.co.uk/Module.aspx?ModuleNo=269

For some reason I bought 2m, I've only used about 200mm!

Yes it is a cracking mod. I just need to sort out seperating the power lines to the dac.

 

[Malefoda]

Stueyh, are you willing to sell me a piece of it? If yes PM me
Brent, ok for your army tank, but what about the opamp on your scale according to you ( I'm scared it's a bit biased as you think you black stuff on tires is fast... ).

 

[RCruz]

I've answered my own question!

Mod done and what a difference! Equal to a new clock and PSU. It's opened the treble by quite a margin.

For those who are interest, I used the mini coax from Maplin.

Somehow I keep dreaming of this mod.... but I have been busy with russian caps

 

[stueyh]

PM sent.

I'm using a couple of 10uF Munford caps on he output bypassed with 0.1uF Russian Teflon caps, I love Russian caps!

 

[RCruz]

Hi stueyh

What type of teflon is it ? (FT-3 ?)

 

[Thomo]

Yeah, the Russian PIO and Silver Mica I've used are awesome.

Cheers, Lee.

 

[padman]

HOW HAPPY AM I

Just performed my 1st open heart surgery on the player!!

1 broken track and encouragement from Ian UV101 got a pair of opmaps in and working

The room acoustics have changed (due to decorating) player sitting on a chair with different interconnects but......

I'm hearing much improved transparency more detail tighter bass and high extension.

Gonna let it burn enjoy the tunes and have another crack tomorrow

Thanks to this forum and special thanks to Ian, Brent and Simon the ball is rolling