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TPA3250 somebody is listening?
TPA3250 somebody is listening?
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Old 25th March 2019, 10:08 AM   #911
chermann is offline chermann  Austria
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Default micro controller

Hi

refrence to pos 902
i just think about the C and the magic 4 connectors what we miss at page 23 #228. TPA3250 somebody is listening?


look at pic:
TPA3250 somebody is listening?

i guess this are for "programming" the C. maybe some C guy can jump in here....

chris
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File Type: jpg FX502pro_inside_BB2134_opamp_C pins.jpg (260.8 KB, 429 views)
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Old 1st April 2019, 05:20 PM   #912
ekbrus is offline ekbrus  Russian Federation
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disassembled FX502S PRO. removed from the ne5532p connectors , checked with a magnet, they stick. Temporarily replaced the JRC4558D. better. Click the image to open in full size.
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Old 3rd April 2019, 01:21 PM   #913
doctormord is offline doctormord  Germany
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What is the point on being magnetic?
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Old 3rd April 2019, 04:49 PM   #914
ekbrus is offline ekbrus  Russian Federation
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maximum deshovy production technology fake ne5532p. in my fx502s pro at the output of ne5532p were electrolytes SamYoung, replaced by tantalum AVX TAP106M035SRW
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Old 3rd April 2019, 08:06 PM   #915
meq123 is offline meq123
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So, I wasn't sure that I believed that being magnetic (or not) proves (or not) that an NE5532 is fake. @ekbrus do you have any reference to base that on?

Having said that, I went to check some opamps I have loose. I tested a pair of ON Semiconductor SE5532's I got from a respected supplier (Arrow), with the pretty strong magnet at the end of a telescoping pickup tool. They were just magnetic - just enough to lift their own weight off the table. I then tried some TL082's (unknown provenance) and they had about the same level of magnetism as the SE5532's.

Then I tried the NE5532's that I'd previously taken out from my FX502S. A whole order of magnitude higher in magnetic attraction - they about leapt off the table when the magnet came near! Hmmm.

Don't know what this means, but it's a data point. Anyone else do a test? Preferably with known good NE5532's vs the 5532's out of your FX502S?
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Old 3rd April 2019, 09:29 PM   #916
voltwide is offline voltwide  Ireland
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Quote:
Originally Posted by ekbrus View Post
maximum deshovy production technology fake ne5532p. in my fx502s pro at the output of ne5532p were electrolytes SamYoung, replaced by tantalum AVX TAP106M035SRW
Fake news Wires of semiconductors are magnetic for decades
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tuby or not tuby, that is here the question!

Last edited by voltwide; 3rd April 2019 at 09:31 PM.
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Old 4th April 2019, 01:49 AM   #917
meq123 is offline meq123
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Originally Posted by voltwide View Post
Fake news Wires of semiconductors are magnetic for decades

Maybe so, but there's magnetic and there's MAGNETIC! Read my post above yours.
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Old 4th April 2019, 04:32 PM   #918
ekbrus is offline ekbrus  Russian Federation
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Quote:
Originally Posted by meq123 View Post
So, I wasn't sure that I believed that being magnetic (or not) proves (or not) that an NE5532 is fake. @ekbrus do you have any reference to base that on?
bought lm4562na/nopb and ne5532p today and compared by magnet. in fact, it speaks about different production technologies, no more
Click the image to open in full size.
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Old 5th April 2019, 02:51 AM   #919
vincepgh is offline vincepgh  United States
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Quote:
Originally Posted by ekbrus View Post
bought lm4562na/nopb and ne5532p today and compared by magnet. in fact, it speaks about different production technologies, no more
Please, resize the picture or use the thumb. It's really annoying.
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Old 10th April 2019, 10:10 AM   #920
chermann is offline chermann  Austria
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Quote:
Originally Posted by ekbrus View Post
maximum deshovy production technology fake ne5532p. in my fx502s pro at the output of ne5532p were electrolytes SamYoung, replaced by tantalum AVX TAP106M035SRW
hi ekbrus

Sorry .. but i did not get your point about magnetic...i personally do not care if the fake opamp are magentic or not- i change it to "orign" onces

the Tantal 10F after the output buffers (opamp) - AVX TAP106M035SRW as you described are instead off the 4 electrolytics. i am not an expert but i guess the TPA 32xx chip do not like DC on its inputs = INA, INB , INC, IND...with the tantal you maybe get some DC....

wait if some experts ...Voltwide/Doc give us an advise here...

chris
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