@Craftech posted:The schematic Rob provided shows the resistor wire soldered to the cathode of the rectifier. That is the way it was before I bought the stud diode.
Well, I was wondering when you were going to mention that. It's a common trap to fall into, as nearly every schematic that Lionel printed(that I'm familiar with) shows the wrong orientation of the whistle rectifier, which would lead to your initial experience.
Of course, the polarity didn't matter until after the 1972 introduction of the electronic whistle, which is polarity sensitive.
