Bought an MTH PCC trolley recently, put a new BCR battery in, got the horn, bell and brake sounds working but can't get the chatter sounds . Using a Lionel postwar LW transformer for power. Suspect this trolley needs an MTH transformer to get all the features going and would appreciate any advice.

Original Post

I think you'll have to have both the whistle and bell.  I made a whisle/bell box from junkbox parts, maybe you can go that route.  The pushbuttons were just things I had laying around, same with the diodes.  As you can see, there are two strings of diodes, and they are always in the circuit.  When you push one of the buttons, it shorts out all but one of the diodes in one direction.  This imparts a DC offset on the track and signals either the whistle or bell, depending on the polarity of the DC offset.

Attachments

Photos (2)

Add Reply

Likes (0)
Post
OGR Publishing, Inc., 1310 Eastside Centre Ct, Suite 6, Mountain Home, AR 72653
330-757-3020

www.ogaugerr.com
×
×
×
×
×