Reply to "Blunami 3 rail AC"

NortonOGR Forum Member

@KarlDL posted:
And there's no way to meet the stall current limit in steamers with large can motors. Once the Blu Shark is finished, an Atlas switcher and possibly a Weaver E8 may be up next on the workbench.

I am running a large Pittman 15v 9433 motor in an MTH scale Hudson. Stall current is about 5 amps. Pulling 8 freight cars, longest on my test track, with smoke running it only draws 1.2 amps max. I agree you wouldn’t want to use this with a Mabuchi 550 or 555 motor found on many Williams brass and Weaver engines but Pittmans are much more efficient.

I chose to rely the Blunami’s protective circuitry if stall current is exceeded but fast fuses or PTCs could also be used if stall current is a concern.

Pete

3/28/237:07 PM

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