Rob: The connections that I listed were just an attempt to verify that I could get these two transformers in phase. This video from Lionel instructs that this is the way to check. I know that the diagram would seem to be right but my tests prove otherwise. You are right that normally the aux power would be connected to accessories such as a light bulb and the outside rail to complete the circuit.
Dave: I believe that you are correct. Let me dig up the schematic diagram for the 1033. The first of the secondary coils is a 5 volt winding for the whistle circuit. After that comes the A tap and the rest of the windings. Since this A tap begins further along in the secondary coil, that would offset the sine wave by some fraction that may not match up with the one generated from the Powermax. Is there some other way to rig this thing using the existing posts on the 1033? I think not. We are out of phase.
