[Gman]

It can be replaced with a NET725 but I would rather upgrade the opamp not just replace it. The opamp goes in a driver board for a Harman Kardon citation 16. Any help is appreciated. Thanks.

G

 

[puppyslugg]

Have you spec sheets or any info on the UA739PC/NET725?

 

[Budgie]

I think you mean NTE725, right?

Look at this -
http://www.audioasylum.com/audio/twe...ges/66362.html

 

[Gman]

Yes I meant the NTE725. I would like to upgrade this part. Not just replace it with a knockoff. PPL are you out there? I will have to look at the thread you posted later Budgie. That site is blocked here at work. Thanks for the reply.

G

 

[Budgie]

The post I linked is from Audio Asylum, asking the same question as yours. The reply lists these chips as replacements-
LM1303
SN76131
TBA231
MC1303P

I can't say how accurate that info is, but I thought it might help.

 

[ppl]

the 739 is a 14 pin Dip and is external comp. the last time i had to upgrade one of these was to use a 8 lead Metal can dual opamp that is internaly compensated and arange the leads to match the + and - input the output and Vcc and Vee rails. i used a metal can AD712 with sonic improvements.