Walk-Around Controllers

Does any one have any info on building one?? Model Railroader had somthing a few years back but i cant find it HELP

A few years ago, Mainline Modeler magazine featured a home-made system call the Cooler Crawler that was rather inexpensive to build, and we are using it on the Cochise & Western Model Ralroad Club 20x40 foot layout in Sierra Vista, Arizona, with 8 hand-held controllers. The system was designed by a group of hobbyists and was on a Web site under the name of TrackTronics. Use the Google search engine to find TrackTronics or Cooler Crawler, and go from there – if you have any experience in electornics do-it-yourself construction projects this is a good way to go.

hi. i have a question for anyone using the starrtech hogger walk around throttle. i had a small short across the rails today and it burnt a resistor on the circuit board. i can replace the resistor but i cannot tell the value of it due to it being scorched. the first band is red and the tolerance band is gold. can anyone help me out. it’s the 100mw model. it is resistor R1 thanks