What is this component used for? - diyAudio
Go Back   Home > Forums > Design & Build > Parts

Parts Where to get, and how to make the best bits. PCB's, caps, transformers, 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 30th August 2004, 11:02 AM   #1
Mrpong is offline Mrpong  Thailand
diyAudio Member
 
Join Date: Aug 2004
Location: Bangkok
Default What is this component used for?

Hello

I'm planning to upgrade some components in my amplifier. I found four brown components that I'm not familiar with.

Two of them are shown in the picure. What are they and their purpose? Can we replace them with better ones? Please suggest.

Thank you.
Attached Images
File Type: jpg unknown components.jpg (24.5 KB, 140 views)
  Reply With Quote
Old 30th August 2004, 11:53 AM   #2
SY is offline SY  United States
diyAudio Moderator
 
SY's Avatar
 
Join Date: Oct 2002
Location: Chicagoland
Blog Entries: 1
Those are 4.7 uF capacitors. Film caps, decent quality. You could buy more fashionable ones, but they won't be any better functionally. Can't say anything about their purpose without a lot more information, like a schematic.
__________________
The more you pay for it, the less inclined you are to doubt it.- George Smiley
  Reply With Quote
Old 30th August 2004, 01:02 PM   #3
Mrpong is offline Mrpong  Thailand
diyAudio Member
 
Join Date: Aug 2004
Location: Bangkok
Thank you so much.

Anyway, could you please tell me how the code means "4.7 uF"?

Unfortunately I don't have its schematic, but what I can tell you now is that these film caps are located between an input section and driving section.

Generally, can they be replaced with the polypropylene type (i.e. SCR or solen)?
  Reply With Quote
Old 30th August 2004, 01:08 PM   #4
UrSv is offline UrSv  Sweden
diyAudio Member
 
UrSv's Avatar
 
Join Date: Jan 2002
Location: Sweden
That type of cap with that type marking is marked in pF. First two digits are value and third digit is number of zeroes. So 475 is 4700000 pF = 4700 nF = 4.7 uF.
__________________
UrSv
Those who say it can't be done should not stop those who are doing it.
  Reply With Quote
Old 30th August 2004, 01:12 PM   #5
Mrpong is offline Mrpong  Thailand
diyAudio Member
 
Join Date: Aug 2004
Location: Bangkok
OH Thank you.
How about replacing them with poly or paper-in-oil ?
  Reply With Quote
Old 30th August 2004, 10:45 PM   #6
Nisbeth is offline Nisbeth  Denmark
diyAudio Member
 
Nisbeth's Avatar
 
Join Date: Jan 2001
Location: Denmark
You can do that if you want, but how much benefit you'll get from a replacement depends on what their function are in the circuit.


/U.
  Reply With Quote
Old 31st August 2004, 11:15 AM   #7
diyAudio Member
 
EchoWars's Avatar
 
Join Date: Dec 2002
Location: Left of the Dial
Quote:
Originally posted by Mrpong
OH Thank you.
How about replacing them with poly or paper-in-oil ?
They are poly, or at least look like it.

Appear to be good caps. I'd leave 'em alone.
  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
SMD Component ID Perry Babin Parts 2 29th June 2008 05:13 AM
Any one know this component ? dytln_02 Parts 3 22nd November 2006 01:30 AM


New To Site? Need Help?

All times are GMT. The time now is 04:12 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