I recently purchased a KTM/US Hobbies 2 Rail Scale SDP-45 (Amtrak) on Ebay. I rewired it for 3 rail operation and added a Dalle electronic reverse unit that I salvaged from either a Weaver Alco or P&D Hobby Shop F-9. The SDP-45 receives center rail AC power from the passenger cars behind it and both of its 3 axel trucks are wired for the outside rails. The six car train made the 9 minute journey on my layout yesterday but the Dalle E-Unit got pretty warm. Today, the loco ran very slowly then E-unit began smoking and quit. I replaced it with another Dalle E-Unit and that also started to get warm when climbing a hill. So I shut it down before it started smoking.
The SDP-45 does not have a can motor. It has a much older single open frame field wound motor that is mounted horozontally.
I also did the same same type of conversion on an Atlas Dash 8 32BW and It runs flawlessly mated when mated with an MTH Genesis. The Dash 8 has 2 flywheel can motors and a QSI E-unit.
Does anyone have any suggestions of how I can to solve this problem?
