Do you know the different of BA9S,BAY9S,BAX9S?Although they differ by just one letter in their names, there is a subtle difference in the base.
BA9S base has a diameter of 9 mm with one contacts on the bottom and two parallel lugs on opposing sides of the base 180 degrees apart.
BAY9S base has a diameter of 9 mm with one contacts on the bottom and bayonet base is two parallel lugs are at 120 degree apart.
BAX9S base has a diameter of 9 mm with one contacts on the bottom and bayonet base is the two parallel lugs are at 150 degree apart.
Pls check below base of BA9S,BAY9S and BAX9S
