Replacement for TA7136P - diyAudio
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Old 20th November 2004, 09:23 PM   #1
Netlist is offline Netlist  Belgium
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Default Replacement for TA7136P

What would be a better sounding opamp to replace the TA7136P?
I can scan the schematic if needed, datasheet can't be found.
It's used as a preamp in a Sansui TU-9900 which I recently acquired.
I'd like to apply the few mods explained here: http://www.fmtunerinfo.com/sansui.html to see if this old beauty could reproduce a bit better.

Thanks

/Hugo
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Old 29th November 2004, 08:56 PM   #2
Netlist is offline Netlist  Belgium
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I did some scanning today.
Perhaps this can ring more bells.

/Hugo
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File Type: gif ta7136sch.gif (54.9 KB, 1064 views)
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Old 29th November 2004, 08:57 PM   #3
Netlist is offline Netlist  Belgium
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Internal schematic:
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File Type: jpg ta7136.jpg (36.6 KB, 933 views)
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Old 30th November 2004, 06:59 AM   #4
paba is offline paba  Canada
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Hello,

i recently replaced the TA7136P in the phono section of a kenwood receiver. The difference is remarkable! wider sound stage and more detail.

I replaced two single op amps with 1 dual opamp. I had a OPA2604 on hand so I used that.

You could use:
NE 5532
OPA604 or OPA2604

Keep in mind that the TA7136P is in single in line package and the new parts come in DIP or even surface mount. So you will need to build a little pin-to-pin mapping or conversion.

TA7136P pins:
1. frequency comp
2. non-inverting input (+ input)
3. inverting input (- input)
4. V-
5. voltage comp
6. outout
7. V+

So for modern op amps you probably don't need to map pins 1 and 5.

Good luck
Paba
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Old 30th November 2004, 10:36 AM   #5
Netlist is offline Netlist  Belgium
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Thanks a lot paba, this was exactly the answer I needed.

A warm welcome to the forum while I'm at it.

/Hugo
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Old 30th November 2004, 05:27 PM   #6
paba is offline paba  Canada
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I've received so much help and advice from various newsgroups and forums and I've learned so much just by reading along other peoples threads... whenever I get the chance to give back I do.

Doesn't happen too often but I contribute what I can.
Let us know how your final conversion sounds.

cheers
paba
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Old 30th November 2004, 05:48 PM   #7
Netlist is offline Netlist  Belgium
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Thanks paba, nice attitude.
I'll report but be prepared to wait a bit

/Hugo
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Old 23rd December 2005, 12:59 AM   #8
opik is offline opik  Indonesia
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Thumbs up cool

Hi,
Thank to everyone have interest to TA7136, i've been months search the datasheet, special thanks Paba! now i can learn to tweak my Boss DS1
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Old 26th December 2005, 10:35 PM   #9
opik is offline opik  Indonesia
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Default I need more data

Dear Netlist..
I wonder do you have more info on TA7136 if you have more scanned file on TA please upload, i need more spec. ... or Paba n others will help??
Thanks in advance!
Regards,
opik
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Old 27th December 2005, 10:52 PM   #10
paba is offline paba  Canada
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Hi Optik,

what info do you need exactly or what are you trying to do, maybe I can help in some way. I have some info on the TA7136AP from Toshiba.

What specs do you need?

cheers
paba
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