@ADCX Rob posted:The CW-80 is a two-throttle power supply. They both use the lever at different times to set the output... there is no fixed voltage tap... AND, the original CW versions DID have A as common, not "U". It was poorly designed in that regard as it was not thought through carefully - proper operation of the whistle & bell required the common connection to be made to the center rail.
I would consider the CW-80 to be a dual output transformer, but not a two-throttle transformer.
The second set of terminals (B-U) is labeled for accessory usage and is fixed at whatever output you set it at. Once set, that second output is no longer controlled by the throttle until and unless you go through the re-set procedure and set it to a fixed output again and the throttle only controls the track (A-U) output.
At any rate, since the OP was using a KW on one loop and the LW on the other and blew up two post-war engines, I thought it important enough and potentially helpful to at least point out that the two transformer's output terminals are "opposite" of one another.
