Brian,
I used to own the ML-7A for about 20+ years and loved that pre-amp,I have seen the inside of both and based on memory the difference between the 7 and 7A was some better small- signal capacitors and a few better small resistors.
I know the sound was better, more transparent. I still have some of those tiny gold pins for phono loading with resistors if you are interested.I will look to se if I still have a schematic. Is this really "Thee Brian Eno" or is that just your user name? jimc555
I used to own the ML-7A for about 20+ years and loved that pre-amp,I have seen the inside of both and based on memory the difference between the 7 and 7A was some better small- signal capacitors and a few better small resistors.
I know the sound was better, more transparent. I still have some of those tiny gold pins for phono loading with resistors if you are interested.I will look to se if I still have a schematic. Is this really "Thee Brian Eno" or is that just your user name? jimc555