I just acquired a Speedotron D1602 power pack with 4 light heads. One MW3U, and three MW3R. Fires at all settings, test button works, fires with camera. Modeling lights have been replaced with what looks like clear Christmas/nightlight bulbs. Numbers on MW3R's make me think it is 1983 era.
Yes, I believe the brownline doesn't have as many power settings but are still reliable workhorses.
Heads (reflector/speedring mounts) and cables are different as well.
Oh no prob.
If you have the space to adjust distance (rather than power) the brownline is an excellent (read: economical) way to get into studio/strobe work. Additional heads and accessories are dirt cheap because no one wants them. The light is every bit as good .
The go to peeps for repair is Flash Clinic in NYC but these are a bear to ship. Dead Link Removed
I don't know your experience level but I'll say it anyway…
be sure to familiarize yourself with proper safety procedures when using this or connecting/disconnecting cables and heads.