I finally hooked up the two Legacy Powermasters, and the Legacy 990 control system today after achieving goal of pretty much finishing TT area. I did make a couple of wiring changes to clean up the hookups. I hooked up the Powermasters according to instructions. To keep things simple I connected the LPMs to the two channels I was using for track 1&2. I connected the 1st one to Channel D of the 275 watt PW ZW. I connected LPM 2 to channel D of the 250 watt PW ZW. I connected the common from the Legacy 990 base to a open common on the fist 275 watt PW ZW. Most of the commons are hooked up to a “ common” terminal strip that then ties into both ZWs. Everything at this point is copasetic. Except for the point that up until the change, the 250 watt ZW would warm first followed by the 275 watt ZW. Now it’s reversed??? The 275 with the straight common from the Legacy base hooked to it warmed first. Doesn’t make sense considering it is only UF signal. I can retry with hooking the 990 base common to the common” terminal strip” . Anyhow, without having a true Legacy engine I still can’t test the used 990 system I bought at the train show the day after Lionel dropped its 2022 catalog with the base 3.
I have two 1st gen TMCC engines I can program into system. But I need to change Traction tires, oil and grease first.
My question is why did the two transformers swap on which one got warmer first by adding the 2 LPMs and the Legacy 990 ?
