'Evening Doc,Thanks Michael and Helmut for this great advice. I will be very very careful...........to avoid the puff of white smoke. Doc Tom
The model Climax in Helmut's link in above post has a TSU-750 motor control/sound chip.
Your consists are probably small & lightweight but be careful in On30. That chip has a MAX motor stall current of only 0.75 A or you'll have genuine white smoke (but only for a second or two). For On30 Consolidations & K27s I am using the 1000 series chips but they haven't hauled anything heavy up a grade yet; they seem OK so far on my test tracks.