Replacing bipolar coupling caps in Lexicon processor? - 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 9th April 2007, 03:43 AM   #1
Wilf is offline Wilf  United Kingdom
diyAudio Member
 
Join Date: Apr 2007
Default Replacing bipolar coupling caps in Lexicon processor?

Hi folks,

Made a few searches on here to find comparisons but wasn't lucky.

Looking to replace some probably very 'tired' 47uf Bipolar 25v Electrolytic interstage coupling caps in my processor and will be removing them for another seperate mod anyway I thought I'd look for suitable replacements, something better, but found it hard to find the same bipolar type to start with anyway.

Any suggestions? I don't know why Lexicon fitted bipolars, I'd of thought the DC bias direction was to this cap. There are the same again at the last op-amps as well.

They're prolly quite old now as well.

I've looked & looked at capacitor PDF's and specs and just can't make any idea what to fit, having a very hard time finding supplies of non-polarised electro's.

Could i use a lower value uf polypropylene type instead?

Any help appreciated, tah.

Wilf
Attached Images
File Type: jpg dscn0046.jpg (79.9 KB, 83 views)
  Reply With Quote
Old 9th April 2007, 03:50 AM   #2
diyAudio Member
 
Join Date: Oct 2006
I think you will probably find, if you take measurements, that Lexicon used the bipolar caps because there is 0volts, or damn near, on the cap. It is very likely that the cap is completely unnecessary(save for the rare event of opamp chip failure), and could be replaced with a piece of wire. No cap is always best when possible in any signal path.
  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
Bipolar Caps for decoupling? jtsaudio Parts 7 29th March 2009 11:35 AM
Replacing multi-section caps with multiple caps? Sir Trefor Tubes / Valves 1 29th May 2007 10:17 PM
Bipolar el-lyt caps in surface mount? ojg Parts 0 7th February 2007 01:53 PM
How to make bipolar caps? jmartinson Parts 7 29th April 2003 11:37 PM
Replacing ceramic disc caps with silver mica caps? G Solid State 5 18th November 2002 01:02 PM


New To Site? Need Help?

All times are GMT. The time now is 01:56 AM.


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