I measured the resistance value of the operational amplifier in the photo. Measurements on the left 1-5...53.6k ohm 1-7...26.35k ohm 5-7...27.22k ohm 1-4, 4-5...Almost insulated(Unmeasurable with my tester) Measurements on the right 1-5...46.9k ohm 1-7...23.04k ohm 5-7...23.83k ohm 1-4, 4-5...Almost insulated(Unmeasurable with my tester) I hope it will be helpful to everyone.
Sounds great, just what I am looking for! Dual channel drop-in replacement for NE5532.