Ok.. just joind your forum to answer this question
Ua739 has a few replacement :-
Ua749 .. does not have same audio db filter but will work
MC1303L direct equivalent
RC4739 direct equivalent
you can also make / use an RC4558 with small surface mount chip adaptor to suit 14pin dip
Ua739 has a few replacement :-
Ua749 .. does not have same audio db filter but will work
MC1303L direct equivalent
RC4739 direct equivalent
you can also make / use an RC4558 with small surface mount chip adaptor to suit 14pin dip