smd parts - diyAudio
Go Back   Home > Forums > General Interest > Car Audio

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 18th September 2011, 11:13 PM   #1
timwebb is offline timwebb  United States
diyAudio Member
 
Join Date: Jan 2010
Location: memphis tn
Default smd parts

i wanted to make sure this was right. the marking om the part is 2t on a cart i have it says its 2n44403. is this correct?
  Reply With Quote
Old 19th September 2011, 12:08 AM   #2
diyAudio Member
 
seankane's Avatar
 
Join Date: May 2010
Location: Washington State
Quote:
Originally Posted by timwebb View Post
i wanted to make sure this was right. the marking om the part is 2t on a cart i have it says its 2n44403. is this correct?
Its actually 2N4403 you have to many 4's in the part number you listed.

2T
p2T
t2T

All of those are the same 2N4403 part number

Try using MMBT4403 when looking up the part. They are all SOT23 package and from what I could find: PNP 80V 100Ma
__________________
Pyramid 52 Amp Power Supply----Fluke 787 Processmeter----Tektronix 465 Scope----Velleman HPS40 Scope----Soldering Iron----Desoldering Iron----Hejet HJ 500-S Heatgun----DM4070 Digital LCR Meter----Propane Torch
  Reply With Quote
Old 19th September 2011, 12:49 AM   #3
timwebb is offline timwebb  United States
diyAudio Member
 
Join Date: Jan 2010
Location: memphis tn
ok thanks!
  Reply With Quote
Old 19th September 2011, 01:57 AM   #4
diyAudio Member
 
Join Date: Nov 2003
Location: Louisiana
If you have any MMBTA56s on hand, they will generally serve as a suitable substitute for the 4403.
  Reply With Quote
Old 21st September 2011, 12:04 AM   #5
timwebb is offline timwebb  United States
diyAudio Member
 
Join Date: Jan 2010
Location: memphis tn
can i replace 2N4401 with MMBTA42?
  Reply With Quote
Old 21st September 2011, 12:12 AM   #6
diyAudio Member
 
Join Date: Nov 2003
Location: Louisiana
Are these for the same section as the previous transistors you asked about?

How are they being used in the amp?

What amp is it?
  Reply With Quote
Old 21st September 2011, 12:18 AM   #7
timwebb is offline timwebb  United States
diyAudio Member
 
Join Date: Jan 2010
Location: memphis tn
yes.the output drive transistors. one side of out puts works as it should. the other side is making the speaker osc really bad. all 640's are brand new
  Reply With Quote
Old 21st September 2011, 12:20 AM   #8
diyAudio Member
 
Join Date: Nov 2003
Location: Louisiana
Please answer all of the questions.
  Reply With Quote
Old 21st September 2011, 12:25 AM   #9
timwebb is offline timwebb  United States
diyAudio Member
 
Join Date: Jan 2010
Location: memphis tn
yes its for the same section.its
being used in the output driver circuit.
an audio pipe 1800
  Reply With Quote
Old 21st September 2011, 12:35 AM   #10
diyAudio Member
 
Join Date: Nov 2003
Location: Louisiana
The a42 is a slower transistor and may run hotter. I'd suggest that you wait and get all of the correct parts for this amp. Class D amps can be finicky and using subs (especially multiple subs) could cause problems. The problems may not be immediately apparent and could cause reliability issues later. If the amp is unreliable or fails while testing, you won't know if it's the drivers or something else.
  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
Bag of mixed SMD parts jkeny Parts 1 2nd November 2009 02:02 PM
Is there any difference between SMD and TH parts? nelsonvandal Solid State 43 24th November 2008 02:39 AM
yet another Mini-A layout... (with SMD parts) BrianGT Pass Labs 32 3rd March 2004 12:28 AM
Comparison of SMD parts to standard parts BrianGT Parts 0 2nd July 2002 09:09 PM


New To Site? Need Help?

All times are GMT. The time now is 11:02 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