This installation of TCS M1 Decoder is for HO Scale United Brass 2-10-2 Steam Locomotive and was performed by Bill Van der Meer of Williamsport, PA
The pictures show an installation of a TCS M1 decoder on a 1970's run of the United Santa Fe 3800 class 2-10-2. brass steam locomotive.I did a considerable external modifications to this model. Internally, I replaced the original open frame motor with a 16X30, 9600 rpm NWSL Sagami Can motor and the original gear box with a Precision Scale 28/1 idler gear box. The gear box and motor are linked to the motor with a brass torque arm bar and Overland delrin universal drive shaft.
The decoder leads were connected as follows: Red to engine frame (right) Orange to motor lead (right) Black to draw bar (left) Grey to motor lead (left) I used mini-connector disconnects to which the blue and white leads were soldered and protected by shrink tubing. The two black wires towards the front in the white shrink tubes are the bulb leads that trail off to the boiler which rests upside down next to and on the right of the drive train assembly. I used a 350 ohm resister to protect the 1.5 volt 30 milliamp bulb. I did not install a reversing light on this locomotive so the yellow lead is inactive and just looped on the mounting pad. The locomotive runs great with excellent slow speed. I hope this little case study helps alleviates fears of installation of your decoders on brass steam locomotives. Its really a snap if you just follow some simple rules and do it the same way every time. Photo on left shows the decoder mounted with double stick tape foam tape to the brass motor mounting bracket underneath the drive shaft .
"Thanks to Fred, Bob and Mike for their continuous technical support"