Guys, it's not the boost voltage that is the issue. The electronic whistles need 1.5 volts to operate. when you move the whistle handle all the way, the DC voltage drops to .5 volt. Too low to operate modern whistles. If you operate the whistle only half way, The DC voltages between the transformer rectifier and the diodes in the electronic reverse unit buck each other and hence the near stall. Try operating a modern train with a older transformer and see what happens. Feel free to post a video! A 1033 will operate the train, just not very well.