If you look at the o-scope video above, the CW-80 does go to zero like wolverine49 says, I guess I don't have anything that runs on very low voltages.
Ironically, one of the defects in some of the very early CW-80s was that they wouldn't throttle down far enough to trip the E-unit. The remedy for this was to put a single light bulb on the layout somewhere to provide a little "resistive load," I think they termed it. The design calls for it to go near enough to zero to stop the motion of the train while keeping any lights on, and then moving the train in it's previous direction, without cycling the e-unit. This simulated a train pulling into a station, unloading/loading passangers, and then moving onward again. It takes a relatively steady hand on the throttle but becomes routine with practice. It may help to know it is supposed to work that way.
As far as I have been able to determine, the "G" models totally corrected this fault.
