The Trainsounds tender I picked up last weekend decided to go silent on me. Could being operated by a postwar RW transformer using a zener diode for the whistle circuit have cooked something? When run on a modern Atlas transformer, one can hear faint whistle and bell noises, regardless of volume control or on/off settings.
Any suggestions? I've already reseated the plugs and the sound chip...
Thanks!
Mitch