play around small chips(tea2025 btl) - diyAudio
Go Back   Home > Forums > Amplifiers > Chip Amps
Home Forums Rules Articles diyAudio Store Gallery Wiki Blogs Register Donations FAQ Calendar Search Today's Posts Mark Forums Read

Chip Amps Amplifiers based on integrated circuits

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
Thread Tools Search this Thread
Old 23rd May 2010, 06:30 AM   #1
digi01 is offline digi01  China
diyAudio Member
digi01's Avatar
Join Date: Mar 2003
Location: BEIJING
Send a message via MSN to digi01
Default play around small chips(tea2025 btl)

i made tea2025 connected in btl,2 x 5W chipamp.very low cost & sound sweet.

have fun
Attached Images
File Type: jpg tea2025btl-top.jpg (69.3 KB, 288 views)
File Type: jpg rear.jpg (83.0 KB, 265 views)
File Type: jpg details.jpg (82.4 KB, 263 views)
  Reply With Quote
Old 25th May 2010, 10:05 AM   #2
diyAudio Member
Join Date: Mar 2009
I got one of those plastic computer drive bay amps. It had two corny speakers like 2" apart and a headphone jack. It fits into an optical bay. I took it apart out of curiosity. They exhibited a hum when I used the headphone jack. I discarded the swiveling box, speakers and kept the circuit board and cords. The chip inside is a tea2025b STEREO AUDIO AMPLIFIER. Weird thing, the silkscreen on the board said for 12v input.
The power cord with the molex connector was wired to deliver only 5v.
So I look up the specs on the chip and it said it needs a minimum of 3v and a max of 12v. So whoever made this amp was cutting it really close. No wonder it sounded bad.
When I tried it again without the speakers wired in, there was no hum out of the headphone jack and the quality was excellent. I would recommend making a nice headphone amp with a nice aluminum project box, a circuit with the above mentioned chip, and for a happy medium; run it on 9v with 6 AA batteries.
  Reply With Quote
Old 16th January 2013, 01:19 PM   #3
Mihkus is offline Mihkus  Estonia
diyAudio Member
Mihkus's Avatar
Join Date: Jul 2012
Heya, i got problem mine is clipping hardli sinewawe more like 1-2hz, what could be the problem?
  Reply With Quote
Old 16th January 2013, 02:22 PM   #4
gootee is offline gootee  United States
diyAudio Member
Join Date: Nov 2006
Location: Indiana
Blog Entries: 1
Originally Posted by Mihkus View Post
Heya, i got problem mine is clipping hardli sinewawe more like 1-2hz, what could be the problem?

What capacitor values did you use, and where? A schematic or photo would probably be helpful.
  Reply With Quote
Old 18th January 2013, 04:43 AM   #5
Mihkus is offline Mihkus  Estonia
diyAudio Member
Mihkus's Avatar
Join Date: Jul 2012
All electrolytics are 100uf 16v and input 1uf MKT
Took the pcb from here but made it bigger so i could install small heatsink...
Btw it is motorboating, i think its not burnt or so just maybe caps are "blown"?
Click the image to open in full size.
image hosting sites
  Reply With Quote


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
TEA2025 alternatives mikesnowdon Chip Amps 33 24th December 2011 10:58 PM
Tested output swing on small chips johnr66 Chip Amps 0 16th March 2009 12:31 AM
can mp7720 btl????? thz6339 Class D 6 1st May 2007 07:08 PM
ultra-BTL digi01 Chip Amps 1 16th March 2007 02:37 PM
I'm looking for a small DIY solution to play Sacd and DVD-audio with my DVDROM withou Progg70 Digital Source 8 9th October 2005 11:46 AM

New To Site? Need Help?

All times are GMT. The time now is 10:24 AM.

vBulletin Optimisation provided by vB Optimise (Pro) - vBulletin Mods & Addons Copyright © 2017 DragonByte Technologies Ltd.
Copyright 1999-2017 diyAudio

Content Relevant URLs by vBSEO 3.3.2