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

Counterfeit/Fake vs. Real TDA chip video
Counterfeit/Fake vs. Real TDA chip video
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 5th November 2017, 01:18 PM   #1
nycavsr2000 is offline nycavsr2000  United States
diyAudio Member
 
Join Date: Jul 2004
Location: North Carolina
Counterfeit/Fake vs. Real TDA chip video
Angry Counterfeit/Fake vs. Real TDA chip video

This is an excellent video complete with die exposure and actual testing of said TDA chip to illustrate the dangers of not buying your favorite chip at an authentic parts warehouse (i.e. Digi-Key, Mouser, Newark, etc...):

YouTube

Moral? Donít cheap out. Itís not worth it. And...pcb layout is extraordinarily important.

Best,
Anand.
  Reply With Quote
Old 5th November 2017, 06:03 PM   #2
tomchr is offline tomchr  Canada
diyAudio Member
 
tomchr's Avatar
 
Join Date: Feb 2009
Location: Calgary
I am amazed by the examples of fakery. I'm even more amazed that it makes financial sense for the manufacturers of the fake goods, in particular when it comes to faking electronic parts.

Some examples of fake products are just horrid. Like the $1 cell phone chargers that are likely to become fire hazards. Or electrolytic capacitors where the writing on the can says 450 V, but the part actually contains a smaller cap rated for 200 V. Or baby formula tainted with lead or antifreeze.
In case of the amp chip in the video, the damage was minimal. The chip didn't explode. It did turn into a power oscillator which could damage your speakers, though.

There are many amp chips out there. For a new project, why not just design something around a genuine part that's currently in production? The parts are pretty cheap even through the official distribution channels. Mouser, Digikey, Newark/Farnell, RS, Jameco, etc. will happily sell you the parts, even in DIY quantities.

Those plugboards used in the video are known awful and useless for anything that resembles performance circuitry. It's not just the contact resistance that limits performance. The inter-row capacitance is quite large as well (on the order of 100 pF as I recall). That tends to be a pretty severe performance limiting factor. Layout matters. Who knew?

Tom
__________________
Modulus-86: 40W/8Ω @ 0.000061% THD. HP-1: 3W/20Ω, 450mW/300Ω @ 0.000032% THD. DG300B and Other Tube Circuits.
Neurochrome : : Audio - www.neurochrome.com - Engineering : : Done : : Right
  Reply With Quote
Old 6th November 2017, 04:37 AM   #3
PRR is offline PRR  United States
diyAudio Member
 
PRR's Avatar
 
Join Date: Jun 2003
Location: Maine USA
I'm wondering if this "2050" might really be a 2020 or 2010, one of the lesser TDAs. Re-marking is cheaper than making.

However there's lots of physical clues that this was a 2nd-rate factory, even if it is some form of TDA.
  Reply With Quote
Old 6th November 2017, 07:29 AM   #4
JMFahey is online now JMFahey  Argentina
diyAudio Member
 
JMFahey's Avatar
 
Join Date: Mar 2009
Location: Buenos Aires - Argentina
They are usually cheap and plentiful TDA2030, relabelled 2050.

Notice this one provided same power as a 2030 would, and was damaged by short (surprisingly didnīt explode) , I *guess* because it was subject to 2050 rail voltages; again guess that if subject to proper rail voltage (+/-14V instead of +/-22V) , it might even survive a short.
__________________
Design/make/service musical stuff in Buenos Aires, Argentina, since 1969.

Last edited by JMFahey; 6th November 2017 at 07:35 AM.
  Reply With Quote

Reply


Counterfeit/Fake vs. Real TDA chip videoHide 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
Counterfeit chip? NadaD Chip Amps 13 31st October 2017 10:14 PM
fake or real ? mgm2000ro Class D 6 14th December 2008 08:03 PM
Rare Sanken's, NEC's, Toshiba's...Real or Counterfeit?? EchoWars Parts 6 18th August 2008 08:40 AM
Counterfeit or fake Scanspeak drivers? Daveis Multi-Way 0 9th October 2007 03:05 AM
Real or counterfeit BUZ90x FET's Bensen Parts 0 9th April 2006 12:43 PM


New To Site? Need Help?

All times are GMT. The time now is 07:26 PM.


Search Engine Optimisation provided by DragonByte SEO (Pro) - vBulletin Mods & Addons Copyright © 2017 DragonByte Technologies Ltd.
Resources saved on this page: MySQL 15.79%
vBulletin Optimisation provided by vB Optimise (Pro) - vBulletin Mods & Addons Copyright © 2017 DragonByte Technologies Ltd.
Copyright ©1999-2017 diyAudio
Wiki