TDA7294 + Power Transistors AMP (TDA7293 to come also) - Page 14 - diyAudio
Go Back   Home > Forums > Amplifiers > Chip Amps

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
Reply
 
Thread Tools Search this Thread
Old 21st June 2013, 06:25 AM   #131
diyAudio Member
 
Join Date: Jun 2004
Location: uruapan, michoacan, mexico
well thats good! and by the way did not mention that your pcb looks very good to me, just noticed about those missing,and ; what power supply are you using?
mine is what is inthe pics, 25-0-25 ac xfrmer, single diode bridge, and 4x 4700uF, plus
2x 220uF at the chip as recomended by Mr Daniel W.Any plans for a final single transistor pair mono pcb?
  Reply With Quote
Old 21st June 2013, 06:29 AM   #132
diyAudio Member
 
Join Date: Jun 2004
Location: uruapan, michoacan, mexico
oh! just went back and noticed your post says 40 0 40 DC supply.
sorry! thanks for sharing your quick PCB
  Reply With Quote
Old 21st June 2013, 02:40 PM   #133
diyAudio Member
 
andrewlebon's Avatar
 
Join Date: Feb 2008
Hello Dr frost
greetings just want to ask you if TDA7293 or TDA7294 which is better for bridging 2 channel with 2 output pairs each channel
warm regards
andrew lebon
__________________
[image][/image]"It's Better to try and fail than to never know and always wonder"
  Reply With Quote
Old 21st June 2013, 09:58 PM   #134
diyAudio Member
 
Join Date: Feb 2012
EWorkshop1708:
Tweak away, if any improvements can be made that's good, i only got it working and spent 10 hours tweaking because im kind of a perfectionist, and would not post here if it did not work, lots of those designs out there, and this design (not mine by the way) i found some years ago, sounded awful and abandoned it, a year later i was looking again to build a new amp and decided to try this again to make a simple to build amp.
And yes no distortion no matter how much you mess up on the crossover components

martin martinez:
Looking good, my first look more messy, the "newer" compact design helped alot on the tidiness.

andrewlebon;
Nice PCB and very glad you like the amp.
Don't know about the bridging, never had time to experiment more, have just been using this AMP non stop for 5 years or so.

------

Im sorry for the VERY late response but have been absolutely swamped in projects etc, my primary concern right now is to complete my Electro DM50, since the motor in the Electro CIAO is on it's last legs and don't want to use any time on it since it has served it's purpose as R&D for 3+ years to transfer to the new bike
  Reply With Quote
Old 22nd June 2013, 04:50 PM   #135
diyAudio Member
 
andrewlebon's Avatar
 
Join Date: Feb 2008
Hello Dr frost
greetings just made and tested 2 pair version can i bridge both channels
for 2 ohms load i would like to try the TDA7293 VERSION if its possible can you share schematic i have made d class h class AB class amps but i am in love with your splendid
amplifier many mant THANKS for sharing it
warm regards
andrew lebon
__________________
[image][/image]"It's Better to try and fail than to never know and always wonder"
  Reply With Quote
Old 22nd June 2013, 09:52 PM   #136
diyAudio Member
 
Join Date: Feb 2012
someone posted the bridge via feedback between to TDA's, i have only tested Bridge (along time ago) with the tried and tested method of inverted amplifier, like LEFT is LEFT and RIGHT is INVERTED RIGHT, i did this using cool-edit audio editor, loading a song and inverting RIGHT channel, putting subwoofer (1400W RMS capable) terminals "+"/"-" onto LEFT "+" and RIGHT "+", Both "-" are as you can see in the schematic GND, this is the same method that is used in almost all CAR-AMP's, they all have RIGHT channel inverted and "+"/"-" (output) switched around.

Here is the TDA7293 (i do believe i posted this before but this thread is becoming pretty long)
Click the image to open in full size.
Very subtle difference from TDA7294 is PINS 12 & 14
  Reply With Quote
Old 23rd June 2013, 02:28 AM   #137
diyAudio Member
 
andrewlebon's Avatar
 
Join Date: Feb 2008
Default amplifier tested

Quick PCB for testing 2 pair amp pcb to be designed with 2 ch and dc protector
warm regards
andrew lebon
Attached Images
File Type: jpg DSCN4850 [800x600].JPG (110.9 KB, 570 views)
__________________
[image][/image]"It's Better to try and fail than to never know and always wonder"
  Reply With Quote
Old 23rd June 2013, 02:44 AM   #138
diyAudio Member
 
andrewlebon's Avatar
 
Join Date: Feb 2008
Hello Dr frost
greetings thanks for TDA7293 SCHEMATIC i have finished TDA7293 PCB will test it today
warm regards
andrew lebon
Attached Images
File Type: jpg DSCN4847 [800x600].JPG (94.8 KB, 547 views)
__________________
[image][/image]"It's Better to try and fail than to never know and always wonder"
  Reply With Quote
Old 23rd June 2013, 03:05 AM   #139
gootee is offline gootee  United States
diyAudio Member
 
Join Date: Nov 2006
Location: Indiana
Blog Entries: 1
Andrew,

You should consider using at least a two-sided board, with one side for ground plane.

Regards,

Tom
  Reply With Quote
Old 23rd June 2013, 09:11 AM   #140
diyAudio Member
 
Join Date: Feb 2012
andrewlebon now that really looks good , and can see your are opting for even more power using 2x Pairs, your amp should be stable in 2 OHM in bridge giving you one hell of alot of power
  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
TDA7294 TDA7293 LM3668 Spice micijanus Chip Amps 2 17th August 2014 03:50 PM
Question about TDA7293 and power module Rotus623 Solid State 11 3rd October 2010 04:59 PM
Differences between TDA7293 and TDA7294???? Leolabs Chip Amps 1 22nd December 2006 10:12 AM
More Power out an TDA7294/3 tab30 Chip Amps 8 24th February 2005 06:54 PM


New To Site? Need Help?

All times are GMT. The time now is 04:39 AM.


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