drive repair tips?

[Tim Shoppa]

> [Bristol splines in classic computers]

They are also predominant in the R-390A geartrain.  While the R-390A
is a radio and thus off-topic, its geartrain is a very competent analog
computer (power-of-two division, differential for adding, etc.)
from the 1950's and thus on-topic!

(OK, the R-390A does have a tube-based divide-by-two flip flop as well.)

Tim.