I have got 2 Williams SD-90, running off a PW- V-150w, Ok, run these at 7-8v, and they are great, smooth, will run forever. Now , I bought , MTH, z-750, just to run MTH, BLUE COMET, 4-6-2, cause did not have any more room , on other compatible transformers. Run it in the 2nd orange level, 2nd mark, does fine: passenger cars light good, and the PW, Crossing signal does great. I wanted to put the Williams SD-90, on the track where BLue Comet, runs, and in doing so it runs like a scalded dog , at the same power location of the Comet: so I have to back it down, and then lights in cars are not bright, and PW Crossing sig, barely lights up. ALSO,it does the slow down routine, I have read about, exactly 1/2 way around., and I do not have any other power connections on the other side of track. Do these heavy --- Williams SD-90, draw that much difference, and does the difference in wattage of Transformers, cause this. Do I need to put another trac lockon, on other side of track,!?? ALL Conventional
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