Is this a real TDA1541A? - Page 42 - diyAudio
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Old 7th April 2013, 03:50 PM   #411
Mike P is offline Mike P  United Kingdom
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Hi Poynton,

Sorry, I know it's a very poor image but it's the only one that the seller provided.

I've copied it again from a different different programe. I don't know if this is any better.
Click the image to open in full size.
windows 7 screen shot

The serial number is:

TDA1541A
11235
HSH0338 2

The 'A' and the '4' appear to have the correct curvy typeface.

Does the 03 date code immediately mark it out as being a fake?
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Old 8th April 2013, 03:20 AM   #412
erin is online now erin  Australia
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03 does not mean it is a fake.
I own very good sounding 2004 chips and I bought quite a lot of them and they all sound very consistent.

I have also seen chips with later date codes.

My experience with TDA1541A is as follows:

1) Irrespective of the date code - if the chip works it is genuine.

2) Irrespective of the date, some arrive with static damage and make bad distorting noises, or only one channel works and the other distorts.

3) The chip gets very hot and nothing works (chip is a fake) OR - chip was inserted upside down which damaged the chip.

4) The date code is not an indicator of genuine or fake chip. - The counterfeiters can print any date they want on it!

5) See point 1, then re-read point 1, if still in doubt, read point 1

The only way to tell if it works is to use it and see.
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Last edited by erin; 8th April 2013 at 03:23 AM.
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Old 8th April 2013, 12:33 PM   #413
oshifis is offline oshifis  Hungary
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My concern is that a faulty chip that gets very hot will most likely blow out the PSU regulators. Is there an easy way to protect the power lines, like using some current limiting devices?
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Old 19th April 2013, 04:34 AM   #414
erin is online now erin  Australia
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Most regulators are self protecting these days.
If in doubt check the datasheet
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Old 19th April 2013, 10:18 AM   #415
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Quote:
Originally Posted by erin View Post
03 does not mean it is a fake.
I own very good sounding 2004 chips and I bought quite a lot of them and they all sound very consistent.
I own some 1988 and some 1998 chips. The '98s sound much clearer and more transparent. Definitely better than the 1988's. How do the 2004' compare?
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Old 19th April 2013, 12:09 PM   #416
erin is online now erin  Australia
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Compared to 87 chips they sound good. They sound slightly different. I wouldn't say better or worse just different. If you know your TDA, you should know what I mean. They all sound slightly different depending on the batch. I don't really worry about it. I think people get way to obsessed with the year. You can get a bad chip, and it will sound not dynamic, in comparison to another. In which case don't use that one. But most of the chips I have tried sounded good.
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Last edited by erin; 19th April 2013 at 12:20 PM.
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Old 16th May 2013, 02:34 PM   #417
neda is offline neda  United States
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Is it possible to have, say, two s1 chips with the same batch number, but manufactured 3 years apart?
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Old 4th August 2013, 12:41 PM   #418
steveor is offline steveor  England
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Quote:
Originally Posted by steveor View Post
Hi

I have 6 old TDA1541A that I was thinking of selling, had them since 2001 to build this project but never got around to it (that was me in the email)

see

source of tda1541a chips - steveor - Tweakers' Asylum

The text is 11121 HSH8918 2 , all have Philips logo

but did I understand that Jean-Paul state that they were now back in production so essentially worthless?

thanks
Steve
Hi,

I posted this three years ago but never got a response to my message, just been doing some tidying up and came across the TDA1541A's and just dropped in to see if there were any responses?

There is a pic in the following post (235/236)

I assume they didn't go back into production since someone is selling the R1 on ebay for £13 !
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Old 29th September 2013, 12:12 AM   #419
Trident is offline Trident  Spain
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Hello, Jean-Paul

I am very interested in purchasing a TDA-1541 S2 legitimate, and would like some advice from you for purchase. I dont have any budget limitation for it buy, but I need to buy one original chip, and not a Chinese fake.

I have clear that my project will be as good as the worst of the components incorporated in the.

Last edited by Trident; 29th September 2013 at 12:17 AM.
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Old 29th September 2013, 01:12 AM   #420
Trident is offline Trident  Spain
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Hello, Jean-Paul

I am interested in purchasing a TDA-1541 S2 legitimate, and would like some advice from you for it purchase. I not have any budget limitation in cost, but if I need to be one original chip, and not a Chinese fake.

I have clear that my project will be as good as the worst of the components incorporated in the.
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