Just a little recap on CD67se mods - diyAudio
Go Back   Home > Forums > Source & Line > Digital Source

Digital Source Digital Players and Recorders: CD , SACD , Tape, Memory Card, etc.

Please consider donating to help us continue to serve you.

Ads on/off / Custom Title / More PMs / More album space / Advanced printing & mass image saving
Reply
 
Thread Tools Search this Thread
Old 22nd January 2005, 02:21 PM   #1
diyAudio Member
 
Join Date: Mar 2004
Location: NZ
Send a message via Yahoo to floatingkiwi
Default Just a little recap on CD67se mods

Hi all

Just a few questions on the old CD67/63 etc mods (and using info from TNT audio and Accoustica)

Caps: Having a hard time finding supplies of everything listed in the various sites, and why replace all the electrolytics when they all seem to be good Elna Cerafines anyway? Only for the extra voltage rating?
What is a good substitute these days for Nichicon PL's? (and bypass caps for the same in the PSU's)
Philips 1% Polystyrenes - can't get 'em??
LCR 2.5% good enough??

LC audio 8065 Type 1 OPamp substitutions:
Got a couple of these and the ******s don't fit due to the size of the ELNA Starget Analogue PSU caps! Did I need type 3? Will I be stuffing up the sound due to lead length inductances if I extend the pins with solid hookup? (I suspect so)

Extisting Opamps:

+12V seems to be slightly differet between the opamps. One is 11.6, other is 11.4 . Cause for concern or am I just being an idiot..


Thanks for any help in advance all

Matt
  Reply With Quote
Old 25th January 2005, 02:49 PM   #2
diyAudio Member
 
Join Date: Mar 2004
Location: Northants U.K
the higher V rating LCR polystyrenes are 1% tolerence. If ya cant source em polyproplyene caps would be more stable that the mylars marantz uses on that filter

up2u with the caps, in the UK farnell sells os-con SP series and other series os-cons also they sell panasonic FC's and rubycon ZA/ZL series, not much in the way of exotics around england unless you mail order from some of the small enthusiast shops around. It somes down to whats around you and how much ya willing to spend, price does normaly = performance with electrolytic caps

The reason your wanting to use higher V rated caps is you'd be using them for their lower ESR (charge/dis-charge speed), you'll notice minor improvements in the analouge stage using low ESR caps ((using those big silmic 470uF 35V at the analouge power inputs on the DAC does a hell of alot, for me it opened the sound stage something cronic, they sound really nice aswell. change ya resoviour caps in the PSU for good quality high ripple rejection caps and slam in the silmics at the analouge PSU pins on the DAC like thorsten suggests, keep ya cerafines, or get some silmics or whatever)), But remember if your changing decoupling caps around the digital ICs your gunna want roughly the same resonant frequency between the cap thats there and the cap your gunna replace it with, digital decoupling really needs to calculated and observed, get data sheets for the caps you have and what ya changing them to so ya can check where that value of cap resonates at. If there physicsly alot bigger than those 220uF 10/16s they proberly wont be right for the task, anything ya change them to will change the sound of the player to some degree, i didnt have to much luck in digital decoupling dept when i had a stab, the originals sounded better than what i had around me, I may have another pop with black gates some time soon in the near future .
  Reply With Quote
Old 26th January 2005, 01:29 PM   #3
diyAudio Member
 
Join Date: Mar 2004
Location: NZ
Send a message via Yahoo to floatingkiwi
Thanks for the reply

Which ones do you mean exactly by the following:

"((using those big silmic 470uF 35V at the analouge power inputs on the DAC does a hell of alot, for me it opened the sound stage something cronic, they sound really nice aswell."

I aren't looking at the guts right now - but you mean taking the big tall ******s from I think 803, 804 (next to the transformer) and putting them in what spots exactly?

Took the muting caps out and got rid of the ground plane as per accoustica's mod - not sure I like it after the muting caps are out... More detail but a bit too much laid back and muffled (if these two ideas don't clash!)

Sorry to ask for exact numbers But I am not electronically trained!! (but the skills are there!!)

Cheers

Matt
  Reply With Quote
Old 26th January 2005, 03:50 PM   #4
diyAudio Member
 
Join Date: Mar 2004
Location: NZ
Send a message via Yahoo to floatingkiwi
Default Can't edit post at top..

But all of the caps are NOT Cerafines as in my first post above. They are ELNA caps though...
  Reply With Quote

Reply


Hide this!Advertise here!
Thread Tools Search this Thread
Search this Thread:

Advanced Search

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off


Similar Threads
Thread Thread Starter Forum Replies Last Post
Questions for Marantz CD67SE kinycobain Digital Source 0 26th January 2006 01:22 PM
My Marantz cd67SE needs a warming up hanszl2001 Digital Source 0 1st April 2005 07:53 AM
new DAC to partner with my cd67se, your guidance plz Drew.J.K Digital Source 0 29th December 2004 07:36 PM
CD67SE mods - where do I go from here? dantwomey Digital Source 13 1st February 2004 02:21 AM
Aliens in my CD67SE? ashok Digital Source 1 6th March 2003 01:33 PM


New To Site? Need Help?

All times are GMT. The time now is 10:29 PM.


vBulletin Optimisation provided by vB Optimise (Pro) - vBulletin Mods & Addons Copyright © 2014 DragonByte Technologies Ltd.
Copyright 1999-2014 diyAudio

Content Relevant URLs by vBSEO 3.3.2