Illinois Capacitor or Cornell_Dubilier - diyAudio
Go Back   Home > Forums > Amplifiers > Tubes / Valves

Tubes / Valves All about our sweet vacuum tubes :) Threads about Musical Instrument Amps of all kinds should be in the Instruments & Amps forum

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 20th August 2011, 09:57 PM   #1
diyAudio Member
 
rsumperl's Avatar
 
Join Date: Oct 2009
Location: Warren Center, PA
Default Illinois Capacitor or Cornell_Dubilier

Greetings everyone,
I am building a driver board that needs a .33uf @ 600v. I have the capacitor in Illinois Capacaitor and Cornell Dubilier. Is there any preference here? Both are new manufacturer.

Thanks
__________________
A great pleasure in life is doing what people say you cannot do.
  Reply With Quote
Old 21st August 2011, 08:31 PM   #2
hates ground loops
diyAudio Member
 
Rodeodave's Avatar
 
Join Date: Dec 2004
Location: in the alps
Blog Entries: 1
What series are they? Wanna post a pic?
__________________
Gravity - Making the G since 13.7 billion B.C.
  Reply With Quote
Old 21st August 2011, 09:02 PM   #3
diyAudio Member
 
rsumperl's Avatar
 
Join Date: Oct 2009
Location: Warren Center, PA
Here are pictures of the capacitors. The yellow is the Illinois Capacitor and the white is the Cornell Dubilier.
Attached Images
File Type: jpg IMG_0177.JPG (487.9 KB, 235 views)
File Type: jpg IMG_0178.JPG (501.1 KB, 218 views)
__________________
A great pleasure in life is doing what people say you cannot do.
  Reply With Quote
Old 21st August 2011, 10:35 PM   #4
hates ground loops
diyAudio Member
 
Rodeodave's Avatar
 
Join Date: Dec 2004
Location: in the alps
Blog Entries: 1
The Cornell Dubilier is a metallized polypropylene type, 940c series: http://www.cde.com/catalogs/940C.pdf
The IC is the same type: Film Products
I'd guess there's no big difference between the two, buy I like the detailed datasheet of the mpw cap, and I also use these as coupling caps in my restored mcintosh tube amps.
Maybe you can check for microphony with an oscilloscope, or check if the cornell cap has copper leads too or if it is magnetic to help you make a decision.
Also determine which lead connects to the outer foil, from my experience you can't tell by the print.
I'd go with the mpw because I have used them before, but that's my subjective opinion.
__________________
Gravity - Making the G since 13.7 billion B.C.
  Reply With Quote
Old 22nd August 2011, 05:42 PM   #5
kruesi is offline kruesi  United States
diyAudio Member
 
kruesi's Avatar
 
Join Date: Oct 2009
Location: Chicago - Gritty, Grey and Windy
The Cornell Dubilier advertises itself as a low-inductance, high pulse current, high dV/dT type-- USUALLY this implies extended foil construction, but these don't say that. Ext'd foil does have a much lower inductance and therefore higher resonant frequency than a conventional type. The Illinois Capacitor says it's a general purpose film, usually implying NOT ext'd foil. The IC also says it's metallized film; the CD doesn't explicitly say- but again, high pulse current types are USUALLY film-and-foil. The CD claims dV/dT about 20-50x greater than the Illinois cap. The CD cap says it uses polypropylene film, the IC doesn't say- I'd guess it likely uses polyester.

They're both fine for interstage coupling in linear audio applications. I like the CD a little better, personally -just based on specs.
  Reply With Quote
Old 22nd August 2011, 06:08 PM   #6
hates ground loops
diyAudio Member
 
Rodeodave's Avatar
 
Join Date: Dec 2004
Location: in the alps
Blog Entries: 1
According to Capacitors by Series/Type - Aluminum, Film, Mica, High Voltage, Ceramic, Tantalum & more - CDE.com the CD is a " Axial Leaded, Double-Metallized Polypropylene Film Capacitor".
And according to Illinois Capacitor the IC is a "metallized polypropylene" type.
__________________
Gravity - Making the G since 13.7 billion B.C.
  Reply With Quote
Old 22nd August 2011, 06:15 PM   #7
kruesi is offline kruesi  United States
diyAudio Member
 
kruesi's Avatar
 
Join Date: Oct 2009
Location: Chicago - Gritty, Grey and Windy
Ah! -Thanks, there, Rodeodave- there's even less difference between them than I thought.

I'm sure they'll both sound like heaven on earth... Silky highs, wooly lows, presence, air, pace, all that kinda good stuff. Either one's fine, I'm sure. Long as they're not ceramic(!)
  Reply With Quote
Old 22nd August 2011, 06:33 PM   #8
hates ground loops
diyAudio Member
 
Rodeodave's Avatar
 
Join Date: Dec 2004
Location: in the alps
Blog Entries: 1
Quote:
Originally Posted by kruesi View Post
...Either one's fine, I'm sure. Long as they're not ceramic(!)
Exactly what I think too, especially for the price.
__________________
Gravity - Making the G since 13.7 billion B.C.
  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
Hi from Illinois kmklr72 Introductions 7 19th January 2011 03:06 AM
Hi from Illinois inept Introductions 4 2nd December 2009 06:36 AM
Illinois Capacitor AFX, AFB for digital??? imperfectcircle Parts 0 9th July 2006 08:04 AM
Hello from Illinois Midwestchopshop Introductions 4 16th November 2005 03:12 AM
Illinois Capacitor JAZZ2250 Parts 2 16th May 2003 01:04 PM


New To Site? Need Help?

All times are GMT. The time now is 09:34 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