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Old 18th May 2007, 11:26 PM   #121
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Hi Folks,

Well I just purchased a pair of JSS9721 and they sound pretty good in my Arcam Alpha 5. Although they may look the same as this one back on post 73

http://www.diyaudio.com/forums/showt...689#post460689

mine are ok.

Regards,

Jon
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Old 19th May 2007, 10:41 AM   #122
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Quote:
Originally posted by JonHarrison
Hi Folks,

Well I just purchased a pair of JSS9721 and they sound pretty good in my Arcam Alpha 5. Although they may look the same as this one back on post 73

http://www.diyaudio.com/forums/showt...689#post460689

mine are ok.

Regards,

Jon
Same batch as mine? I see they are grinded too
http://www.diyaudio.com/forums/showt...956#post861956
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Old 19th May 2007, 12:13 PM   #123
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I had 10 of the TDA1541A on e-bay ; claimed to be of the year 2000 none of them was working .
Just lot of heat .
The seller was honest anyway and refounded me .


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Old 19th May 2007, 12:20 PM   #124
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Tubee,

Quote:
Same batch as mine? I see they are grinded too
http://www.diyaudio.com/forums/show...1956#post861956
How do you know that these have been reprinted and aren't genuine ? They are certainly 'A' of some year - why not 97 ?

Regards,

Jon
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Old 19th May 2007, 03:30 PM   #125
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Quote:
Originally posted by JonHarrison
Tubee,



How do you know that these have been reprinted and aren't genuine ? They are certainly 'A' of some year - why not 97 ?

Regards,

Jon
I have six 1541 dacs ordered few years ago, two are original: moulded surface and printed, four are sanded off (probably with scotch brite) and reprinted for some reason, i guess for a relabeling to "A", the production year could have been anything then.
But they sound all about the same.
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Old 19th May 2007, 03:35 PM   #126
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Quote:
Originally posted by stefanobilliani
I had 10 of the TDA1541A on e-bay ; claimed to be of the year 2000 none of them was working .
Just lot of heat .
The seller was honest anyway and refounded me .


ECdesigns ordered some TDA1541A's from a parts distributor and received relabeled TDA1540's, allmost fried his dac with them
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Old 19th May 2007, 04:06 PM   #127
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Tubee,

Quote:
I have six 1541 dacs ordered few years ago, two are original: moulded surface and printed, four are sanded off (probably with scotch brite) and reprinted for some reason, i guess for a relabeling to "A", the production year could have been anything then.
My JSS97 are certainly TDA1541A and not reprinted TDA1541 - they distort without the DEM cap fitted. Why would someone sand a TDA1541A and reprinted it as a TDA1541A ? Surely if they were going to the trouble they would make it an S1 or S2 ? Perhaps I am mistaken but I think that the JSS97 were printed like that in the Philips factory.

Regards,

Jon
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Old 19th May 2007, 04:37 PM   #128
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Quote:
Originally posted by JonHarrison
Tubee,



My JSS97 are certainly TDA1541A and not reprinted TDA1541 - they distort without the DEM cap fitted. Why would someone sand a TDA1541A and reprinted it as a TDA1541A ? Surely if they were going to the trouble they would make it an S1 or S2 ? Perhaps I am mistaken but I think that the JSS97 were printed like that in the Philips factory.

Regards,

Jon
I will check my batch and dac's tonight and report. Have no dig. camera at hand, otherwise could show some pictures.
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Old 19th May 2007, 06:38 PM   #129
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Quote:
Originally posted by JonHarrison
Tubee,
My JSS97 are certainly TDA1541A and not reprinted TDA1541 - they distort without the DEM cap fitted. Why would someone sand a TDA1541A and reprinted it as a TDA1541A ? Surely if they were going to the trouble they would make it an S1 or S2 ? Perhaps I am mistaken but I think that the JSS97 were printed like that in the Philips factory.

Regards,

Jon
Does the upper printed black surface have an other appearance compared to the back?: if yes it is sanded/relabelled for sure, i can see that on my JSS9721 2 batch. On your posted photo the round circles are not grinded, and more even black colored compared to the higher sanded surface.
But they can sound good, it is not a bad chip Jon.

When i upgrade a TDA1541 to TDA1541A i keep the dem cap with both chips, only pin 4 can be grounded with the "A", and pin 4 of plain 1541 is connected to BCK (4.6 or in non-os 2.8Mhz)

Here they are; (Sorry for poor photo resolution. Grabbed from an earlyer post on internet)
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Old 19th May 2007, 06:47 PM   #130
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Discovered my two:

TDA1541A
11260
HBH9635 2

has "CHINA" moulded in round dot on backside! (the four "JSS9721 2" are from far east, and doesn't have the china mark)
So the HBH is not from Holland??
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