What would cause the relay to hum when track voltage is applied?
Original Post
Replies sorted oldest to newest
Many questions:
*This is a pre/postwar tender with an analog relay for an air whistle, correct?
*Your power supply to the track is 50/60 cycle AC (not DC or low cycle AC?)
*Does the whistle otherwise operate normally on command?
*Have you tried an alternate power source and whistle activator?
*Is this a new behavior or is this a resurrection project?
It is the 2671W tender. Power is from a ZW. I just did some work on it yesterday because it did sound like a grinder. Whistling fine now other than the relay is humming with track voltage applied.
Normal.....
If you CAREFULLY twist the paper wound coil just slightly it will usually quite them down. When I mean carefully, that means don't twist too much where you break the little soldered wire on the relay frame.
