why?

tadiam1 · 26th August 2011, 12:07 PM

Yesterday buy an tda2050 to replacement an lm1875 in my test table.
This (tda...) no work. ac tension sound in the speaker.
Why? fake tda?
any idea?
thanks

palstanturhin · 26th August 2011, 01:46 PM

From China?
Easily fake or not working components...
Replace with an other one, and it works just fine.

Have had many...

johnr66 · 26th August 2011, 05:21 PM

Where did you get it? I bought some TDA2040 ICs off ebay and one came with a supply rail on the output. It was put into a known good circuit to test and was swapped with a good one to be sure it wasn't me screwing something up. I had fun blowing up the rest of the working ones by turning the signal to clipping and shorting the outputs. I don't think these fakes even have proper short circuit protection working. I now buy them through DigiKey and have been flawless.

tadiam1 · 26th August 2011, 05:56 PM

I buy this in my local electronic store.
for the price 1,70 dollar maybe are fake.....
This no have the dot in the case and the words not are clear and white

26th August 2011, 12:07 PM	#1
tadiam1 diyAudio Member Join Date: Dec 2009 Location: argentina	why? Yesterday buy an tda2050 to replacement an lm1875 in my test table. This (tda...) no work. ac tension sound in the speaker. Why? fake tda? any idea? thanks

26th August 2011, 05:56 PM	#4
tadiam1 diyAudio Member Join Date: Dec 2009 Location: argentina	re I buy this in my local electronic store. for the price 1,70 dollar maybe are fake..... This no have the dot in the case and the words not are clear and white

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26th August 2011, 01:46 PM	#2
palstanturhin diyAudio Member Join Date: Jun 2011	From China? Easily fake or not working components... Replace with an other one, and it works just fine. Have had many...

26th August 2011, 05:21 PM	#3
johnr66 diyAudio Member Join Date: Mar 2009	Where did you get it? I bought some TDA2040 ICs off ebay and one came with a supply rail on the output. It was put into a known good circuit to test and was swapped with a good one to be sure it wasn't me screwing something up. I had fun blowing up the rest of the working ones by turning the signal to clipping and shorting the outputs. I don't think these fakes even have proper short circuit protection working. I now buy them through DigiKey and have been flawless.

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