Go Back   Home > Forums > >
Home Forums Rules Articles diyAudio Store Blogs Gallery Wiki Register Donations FAQ Calendar Search Today's Posts Mark Forums Read

Chip Amps Amplifiers based on integrated circuits

TDA7293 distortion/power supply issue
TDA7293 distortion/power supply issue
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 24th December 2017, 06:30 PM   #21
nigelwright7557 is offline nigelwright7557  United Kingdom
diyAudio Member
 
nigelwright7557's Avatar
 
Join Date: Apr 2008
Location: Carlisle, England
The tda chips can oscillate if the gain is too low or bad pcb layout.
Check for oscillation on the output.


Quote:
Originally Posted by Fast Eddie D View Post
I wondered how these hucksters could build these boards cheaper than the cost of the parts, so I bought a few.
These fake amplifiers are made for the cost of the UK postage.
I looked into making and selling them and couldn't even remotely compete.
__________________
PCBCAD51 pcb design software. 2018 version out now with lower prices >> http://www.murtonpikesystems.co.uk

Last edited by nigelwright7557; 24th December 2017 at 06:37 PM.
  Reply With Quote
Old 28th December 2017, 04:36 PM   #22
Auzman is offline Auzman
diyAudio Member
 
Join Date: Jul 2014
Hi everyone.

I'm away from home for holidays so I cannot test more the amplifiers.
Since the schematic, parts values and type are the same as the application note and the PCB layout is not that bad, I believe that the issue is mainly due to the PSRR and supply quality. I will make further tests as soon as will be back home and report back.
Thanks to everyone, I wish you all wonderful holidays and a great new year!
  Reply With Quote

Reply


TDA7293 distortion/power supply issueHide 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

Forum Jump

Similar Threads
Thread Thread Starter Forum Replies Last Post
Power Supply for TDA7293 Tee Nexus Power Supplies 3 19th May 2017 04:59 PM
Which power supply for a TDA7293 board? Coliban Power Supplies 3 3rd February 2016 11:07 AM
tda7293 power supply voltage sonyzz Chip Amps 50 19th January 2014 09:26 AM
Power supply issue shon35us Power Supplies 6 30th March 2008 07:00 PM
power supply issue classalpha Pass Labs 9 3rd June 2006 04:56 PM


New To Site? Need Help?

All times are GMT. The time now is 06:20 PM.


Search Engine Optimisation provided by DragonByte SEO (Pro) - vBulletin Mods & Addons Copyright © 2018 DragonByte Technologies Ltd.
Resources saved on this page: MySQL 15.79%
vBulletin Optimisation provided by vB Optimise (Pro) - vBulletin Mods & Addons Copyright © 2018 DragonByte Technologies Ltd.
Copyright ©1999-2018 diyAudio
Wiki