All old Dolby circuits were Dolby B type for consumer decks.
The A150 at Teac was a favorite deck to avoid. Very troublesome to repair so some how I got stuck as lesser Technicians avoided it. This model was not a long lasting unit and gave us plenty of trouble. I sure they can be fixed but the use of a much better unit is a better idea. That deck has nothing that is special- it is larger than the smaller V-1, V2, V4. V5RX units and does not work as well and for the same size the C-3RX could be obtained. The placement of the heads make it real difficult to clean and to get to the Pinch Roller. Don't pick on me for the bad news- I am just the messenger.