SACD player Op-amp questions! - 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 19th January 2004, 01:41 PM   #1
diyAudio Member
 
Join Date: Dec 2003
Location: Massachusetts
Question SACD player Op-amp questions!

Hi there, I just bought a Sony NS685V sacd/dvd player and of course I have opened up the lid to look for possible mods, the analog output board uses "ST C4558" op amps and 47uF output caps on it (electrolytic), the C4558 is a dual bipolar op amp in a SMD package.

My questions are, is the Burr Brown 2134 dual op amp a direct pin for pin swap? I have checked the PDF data and it looks to be, but what about offset voltages etc? I am not an expert so any advice is appreciated, I have all the de-soldering tools and SMD tools at work for the swap.

My other queastion is, what would you suggest swapping the 47uF electolytic output caps to? 47uF seems quite high, would I get away with less? If so I can get my hands on plenty of WIMA polypropylene caps to swap them with, would 3.3/6.6uF be too low?

Thanks again folks for your advice!


Chris
  Reply With Quote
Old 19th January 2004, 01:45 PM   #2
diyAudio Member
 
Join Date: May 2001
Location: London UK
Default Re: SACD player Op-amp questions!

My questions are, is the Burr Brown 2134 dual op amp a direct pin for pin swap? I have checked the PDF data and it looks to be, but what about offset voltages etc?
----------------------------------------------------------------------

Yes, no problem

---------------------------------------------------------------------
you suggest swapping the 47uF electolytic output caps to?
----------------------------------------------------------------------

Use 47 uF BGN
  Reply With Quote
Old 19th January 2004, 02:18 PM   #3
diyAudio Member
 
Join Date: Dec 2003
Location: Massachusetts
Wink Thanks

Use 47 uF BGN


What exactly is a BGN? is that the type of cap or the brand? I had a look on digikey but I didn't see anything.

Thanks!

Chris
  Reply With Quote
Old 19th January 2004, 02:48 PM   #4
diyAudio Member
 
Join Date: May 2001
Location: London UK
Default Re: Thanks

Quote:
Originally posted by bart_dood
Use 47 uF BGN


What exactly is a BGN? is that the type of cap or the brand? I had a look on digikey but I didn't see anything.

Thanks!

Chris
----------------------------------
Black Gate N type (non-polar) from Michael Percy or Parts Connexion.
  Reply With Quote
Old 19th January 2004, 03:32 PM   #5
eganz is offline eganz  United States
diyAudio Member
 
Join Date: Sep 2003
Location: MN
Or from Reference Audio Mods ...
These are very high quality electrolytic capacitors suitable for coupling applications.
  Reply With Quote
Old 19th January 2004, 04:16 PM   #6
diyAudio Member
 
Join Date: Apr 2003
Location: Boston Area
Yeah, get the 6.3V, 47uF Black Gate NX Hi-Q (non-polarized) caps.
If you use partsconnexion, it is item number BLKGATE- 60206 ($2.55 each).

I really like these caps for output decoupling purposes. As far as going lower than 47uF, it depends on what the rest of the circuit looks like. You 'may' lose low frequency bass if you go lower, but like I said, it depends on how the output stage is configured (in terms of R, L, and C components).
  Reply With Quote
Old 20th January 2004, 08:23 AM   #7
rbroer is offline rbroer  Netherlands
diyAudio Member
 
rbroer's Avatar
 
Join Date: Mar 2002
Location: Netherlands
Default Re: Re: SACD player Op-amp questions!

Quote:
Originally posted by fmak
Use 47 uF BGN
Hi Fred,
I don't get you
For someone stating being able to hear directionality of resistors , your advice for BG-N as coupling cap is quite strange. IME it's just ok and gives one a hifi-ish sound, but not more than that, not even when using two anti-parallel.
And I do not hear directionality of resistors
There are quite a few more transparant and neutral caps out there, see the numerous threads on these forums.
__________________
Rudolf Broertjes
  Reply With Quote
Old 20th January 2004, 12:42 PM   #8
diyAudio Member
 
Join Date: May 2001
Location: London UK
Default Re: Re: Re: SACD player Op-amp questions!

Quote:
Originally posted by rbroer


Hi Fred,
I don't get you
For someone stating being able to hear directionality of resistors , your advice for BG-N as coupling cap is quite strange. IME it's just ok and gives one a hifi-ish sound, but not more than that, not even when using two anti-parallel.
And I do not hear directionality of resistors
There are quite a few more transparant and neutral caps out there, see the numerous threads on these forums.
--------------------------------------------------
Put this in context; probably the best choice for his situation. The BGNs take a LONG time to break in and are better than other lytics I know. If you like ANALYSIS then BG-FK.

There is no reason to spend e100s on a basic SACD.


  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
Looking for new player SACD/DVDA is a must! Dougie085 Digital Source 8 27th July 2007 05:04 AM
does anybody have a JLTi SACD Player kensell21 Digital Source 0 21st June 2006 06:26 AM
Sony SACD player Vivek Digital Source 6 28th January 2005 04:12 PM
Is it possible to modify a US DVD/SACD player? m.parigi Digital Source 3 17th November 2004 11:46 PM


New To Site? Need Help?

All times are GMT. The time now is 05:49 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