Steam whistle stuck on

[kgstones]

Thanks again for all your help.  I received the transistors and replaced the one on the whistle board and it now works perfectly.  So, rather than buy a new board it was worth fixing the one I had.  Thanks again for all your input, that goes for everyone that pitched in, I really appreciate it and have learned a lot from all of you.

Mickey

[lionelsoni]

Congratulations!  I know the feeling of satisfaction in managing to fix something that most people would throw away.  And thanks for letting us know about your success.

[SteveBoatworks]

Hi Bill,

I have the same issue that Mickey had,  Do you still have any of those whistle control boards , if so, please let me know.

THanks

[pm14450]

lionelsoni

A suitable TVS is the 36-volt 1.5KE36CA.  The mouser part number is 625-1.5KE36CA-E3 and it sells for 71 cents:  http://jp.mouser.com/Search/Refine.aspx?Keyword=625-1.5KE36CA-E3 .  It looks like a diode, about .2 inch in diameter and .33 inch long.

Hi Bob, hopefully you are still active in this thread/ community. 

in regards to this old post, I am fighting this battle now and have some basic questions. 

My set up includes a 1033 transformer and a 6-16673 tender. I use the U-A output with U on the center rail and the whistle is stuck on.....

Is the TVS you referred to above a unidirectional or Bidirectional device? if unidirectional, what is the orientation in the circuit. I am assuming this is installed in parallel accross the red and black wires feeding the circuit board and motor. 

 

Thanks in advance. pm14450

[Flintlock76]

For what it's worth the same thing happened to me about a year or so ago, the whistle started blowing as soon as power was applied to the track.  I use MTH Z-1000 tranformers.  I replaced the circuit board and that solved the problem. 

[ADCX Rob]

pm14450

Is the TVS you referred to above a unidirectional or Bidirectional device? if unidirectional, what is the orientation in the circuit. I am assuming this is installed in parallel accross the red and black wires feeding the circuit board and motor.

Yes, bidirectional.

[pm14450]

Thanks!!!! Those TVS seem to be the priciest ones on-line. I can get 1.5ke33ca or 1.5ke39ca fairily cheap. Would either of these be an acceptable substitution?

pm14450