What are these components? - 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 14th January 2006, 07:34 AM   #1
Mrpong is offline Mrpong  Thailand
diyAudio Member
 
Join Date: Aug 2004
Location: Bangkok
Default What are these components?

Hello, I found some components in my preamplifier. One says "331JF". It's orange and looks like capacitors. The other one says "2A392J. This one is green and also look likes capacitors.

could you please help me encode these components? Thank a lot.
  Reply With Quote
Old 14th January 2006, 07:56 AM   #2
Vivek is offline Vivek  India
diyAudio Member
 
Join Date: Nov 2000
Location: Bangalore, India
Any pics possible? That would be useful.
__________________
Thank God for DIY audio.
  Reply With Quote
Old 14th January 2006, 08:04 AM   #3
sbrads is offline sbrads  United Kingdom
diyAudio Member
 
Join Date: Jun 2005
Location: Kent, UK
Default Re: What are these components?

Quote:
Originally posted by Mrpong
Hello, I found some components in my preamplifier. One says "331JF". It's orange and looks like capacitors. The other one says "2A392J. This one is green and also look likes capacitors.

could you please help me encode these components? Thank a lot.
The values are probably 330pF for the orange one and 3900pF for the green. That's just based on experience rather than having found them in a catalogue or anything. With codes like these you look for 3 consecutive numbers that make sense in preferred values (e.g. E24 series) and if there's nothing on the capacitor saying what the units are (e.g. pF, uF) then the last digit of the 3 will be the number of zeros with the units being pF, so 105 would be 1uF, 224 would be 0.22uF.

The acid test though is measuring the things but most DVMs don't like small caps in circuit, even the expensive bridge I use at work can get it wrong sometimes and some caps have to lifted to get a true reading.
  Reply With Quote
Old 15th January 2006, 10:18 AM   #4
Mrpong is offline Mrpong  Thailand
diyAudio Member
 
Join Date: Aug 2004
Location: Bangkok
Default Thank you

Wow...Thank a lot. Sorry I don't have a digital camera with me now. However, I removed the one with code "2A392J" and measured it. The meter said 4.16nF or 0.00416 uF. I think it should be 3900pF as you said. What does "2A" and "J" mean?
  Reply With Quote
Old 15th January 2006, 10:33 AM   #5
diyAudio Member
 
Join Date: Dec 2005
Location: Kuala Lumpur
The J suffix usually means 5% tolerance

2A prefix means 100V rating
  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
SAE Components Marc S Swap Meet 11 4th June 2013 08:04 PM
NCD components rootbeer Class D 4 15th March 2009 05:09 PM
where to buy components dayking79 Solid State 4 6th February 2009 07:46 PM
components Swanic Parts 0 11th November 2004 10:00 AM
amp and components for a 911? jbrinkely Car Audio 2 23rd September 2004 01:18 PM


New To Site? Need Help?

All times are GMT. The time now is 12:53 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