Thanks Kevin, RCM was very helpful.

Kevin,

Thanks for the response.  However, I am only trying to find a steam whistle sound board that would work in the box car.  The train set I have already has the steam engine sound board installed in the coal tender.  

John

I would like to find and install in my G-Scale box car a battery operated (9v?) sound board with speaker that is activated with a remote switch (like a magnetic switch).  Can anyone lead me to a source for such a sound kit?

Thanks