Prototypical Model Trains 55 Market Street - Suite 209, Ipswich, MA 01938 USA Toll-Free:(866)916-0833 Local: (978)356-0400 Fax: (866)479-9316 e-mail us HO Signals   Circuitron signals controls, block signals controls, semaphore signals controls, target signals controls, model railroad signal control modules, signals model railroad, semaphore model railroad, , equipment model railroad, signals connected to turnouts model railroad, electrical contacts model railroad, electronics model railroad, model railroad signal software, block control model railroad, infra-red controls model railroad,       Description Price 1.   AR-1 Automatic Reversing Circuit Item No. 800-5400 $44.95 2.   AR-2 Automatic Reverse w/Adjustable Delay Item No. 800-5401 $54.95 3.   AS-1 Automatic Slowdown Item No. 800-5601 $18.95 4.   BD-1 Optical Detector Item No. 800-5501 $34.95 5.   SD-2 3-Position Semaphore Driver Item No. 800--5520 $19.95 6.   TL-1 Traffic Light Controller Item No. 800-5820 $34.95 All prices in US Dollars         HomeAbout UsHO Scale locomotives HO Freight CarsHO guage Passenger cars, streamline passenger carsDigital Control Command DCCHO Switch MachinesHO SignalsHO StructuresModeling ToolsShippingView CartPrivacy Policy