On 19 Oct 2008 at 17:11, M H Stein wrote: > Sounds like you've got one of the later System 3's with a Tandon TM848; > the older ones used dual-slot Perscis, which used 110VAC for the motor. > > And of course he could also use a 5 1/4" drive instead. The Persci 270/277 dual drives still require +24v for the positioner, no? Cheers, Chuck