troller autopulse momentiom 5 trainsformer

Model Railroader Electronics and DCC
1

can any one tell what the voltage regulator would be? I cannot read the numbers on it.

2

Read here. One person said it is a TIP120.

http://cs.trains.com/forums/ShowPost.aspx?PostID=112533

http://www.radioshack.com/sm-tip120-npn-d-transistor–pi-2062617.html

Click on Check stores near you.

Rich