Jim- The time base is a 3b2 and the amp is a 3a72.
Just downloaded the complete manual from BAMA=
all 100+ pages.!!! Its going to take a while to see
if I figure out this "tool". I understood it could also
be used as a signal generator but the manual reads as if I should
already know all these things?
One of those BNC connectors must be used to input a signal to the
scope and/or output a
455khz sig. I,ve got the whole winter to play
with it.
George VE1NK