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Help with finding equivalent Operational Amplifier from AD converter

ssyniu

Sep 20, 2017
41
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Sep 20, 2017
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Hi guys I own old sampler I think one or more operational amplifiers are faulty so I want to replace them as the machine is very old I am looking for help with finding something that would fit instead of the old one.Would you be able please to tell me if I can get something equivalent and if possible if you could post a link to this chip where I can buy it it would be grate all the best.
Here is the picture of the first op amp :

https://ibb.co/zQCdrQy

Would this one work(Does the second number(9746C10) matters as it different from the original one(9427C01))???

https://www.ebay.co.uk/itm/323813750458

Or its not important as long as the first number(C812C) is correct???

Here is the second OpAmp:

https://ibb.co/jV1dqD2

Would this one work instead???

https://www.ebay.com/itm/203157810857?epid=20012035370&hash=item2f4d262ea9:g:xtEAAOSwzrxUtpN9

And finally the last one:

https://ibb.co/nRnqsZr

Would this one work instead:

https://www.ebay.co.uk/itm/192747654627?epid=2243666181&hash=item2ce0a7cde3:g:ykAAAOSwndZaYcYj

Thank You
All the best
 
Last edited:

ssyniu

Sep 20, 2017
41
Joined
Sep 20, 2017
Messages
41
Hi So u think this one will do intead the one ive posted or both.
Cuz you didnt comment nothing.
Please r leat me know
 

ssyniu

Sep 20, 2017
41
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Sep 20, 2017
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Mabye u see i dont know thats why i am asking here does the codes on the replaced one needs to be exactly the same as on the original one?
I am asking about this code:9427C01???
Its a little bit different code compering to the original one?
 

bertus

Moderator
Nov 8, 2019
3,303
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Nov 8, 2019
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3,303
Hello,

The C812C is the partnumber.
The other code is likely a production date/number.
That can vary for each batch produced.

Bertus
 

ssyniu

Sep 20, 2017
41
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Sep 20, 2017
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Oh grate i was wandering what the other code means.Need to place the order than.All the best
 

Journey11

May 23, 2018
88
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May 23, 2018
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As long as the pinouts are the same it should work ... if the part is not identical spec-wise you mat get a slightly different performance out of it. May or may not affect the sound ... the ear probably wouldn't hear it. If this is a vintage keyboard synth ... I have done a few of these and replacement parts are hard to get so have to sub something close with exact pinout out for pinout and supply voltages are good to go ... I find sometimes the sub part performs better because of better/newer technology in production and improved design.
 

ssyniu

Sep 20, 2017
41
Joined
Sep 20, 2017
Messages
41
As long as the pinouts are the same it should work ... if the part is not identical spec-wise you mat get a slightly different performance out of it. May or may not affect the sound ... the ear probably wouldn't hear it. If this is a vintage keyboard synth ... I have done a few of these and replacement parts are hard to get so have to sub something close with exact pinout out for pinout and supply voltages are good to go ... I find sometimes the sub part performs better because of better/newer technology in production and improved design.
Hey.I am glad you participate.I would really appreciate if you could check above in the main question if the parts i found would work in your opinion as a replacment to the original ones.Please I would appreciate. All the best
 
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