Balancing an RSG rotor

["Tesla list" <tesla-at-pupman-dot-com>]

Original poster: "Rothman, Aric by way of Terry Fritz <twftesla-at-qwest-dot-net>" <Aric.Rothman-at-Honeywell-dot-com>

I am in the process of completing a SRSG.  The 1/2 hp, 3450 RPM motor has
had it's armature flats ground, and a G-11
phenolic disk has been machined.  The disk is attached to the motor shaft
using a pulley as a flange, it's face having
been turned on a lathe.  The disk spins true, without significant runout
(wobble) but significant vibration is evident
nonetheless.  What are good techniques for balancing the rotor?

BTW, the problem I was experiencing with my TC; where the spark gap was
arcing, and minimal output on the top load was
present, was due to one of the phases on the NST having died.  I have a few
backups, so its not a big problem.  I'm just
glad those Maxwell caps are still sound.  Whew!

Aric