B7S2

pin                     board

1                           f (filament)
2                           K (cathode)
3                           G (control grid)
4                           F (focus)
5                           nc (no connection)
6                           nc
7                           Y1
8                           Y2
9                           A (anode)
10                          X2
11                          X1
12                          A (anode)
13                          nc
14                          f

"button" anode on side of CRT - tie to highest voltage