I have a streamlined tender that came with my 736. With the engine and tender operating on the track, everything is fine until I blow the whistle. Pushing the transformer whistle button, the whistle blows loud and strong. When I release the whistle button, the whistle keeps blowing loud and strong. If I kill the power to the track, the whistle shuts off (it should without power). I can then put power to the track and the engine will run and the whistle remain quiet, until the next time I push the whistle button.
Obviously, the whistle relay does not drop out when I release the whistle button, but does when I take away track power. Anyone seen this before? I'd like to fix it but I'm stumped right now.