The F7 differed from the F3 primarily in internal equipment (mostly electrical) and some external features. 40,000 lb (18,000 kg) for an F7 with 65 mph (105 km/h) gearing, compared to 32,500 lb (14,700 kg) for an F3 with the same gearing. A total of 2,366 cab-equipped lead A units and 1,483 cabless-booster or B units were built. Note: the B unit is often referred to as an F7B, whereas the A unit is simply an F7.For clarity, BLI refers to A units as F7A. Many F7s remained in service for decades, as railroads found them economical to operate and maintain. However, the locomotive was not very popular with yard crews who operated them in switching service because they were difficult to mount and dismount, and it was also nearly impossible for the engineer to see hand signals from a ground crew without leaning way outside the window. As most of these engines were bought and operated before two-way radio became standard on most American railroads, this was a major point of contention. Paragon3 Sound & Operation System FEATURING. With Authentic Sounds and Prototypical Operation in both DC and DCC environments. Integral DCC Decoder with Back EMF for Industry Best Slow Speed Operation in DC and DCC. Precision Drive Mechanism engineered for continuous heavy load towing and smooth slow speed operation. Premium Caliber Painting with Authentic Paint Schemes. Prototypical Light Operation with Golden White LED Headlight (and MARS Light Where Applicable). ABS Body with Die Cast chassis for Maximum Tractive Effort. (2) Operating MicroTrains #1015 or Compatible Couplers. Separately Applied Hand Rails, Grab Irons, Rear Diaphragm, and Horn(s). Will Operate on Code 55, 70, and 80 Rail. Recommended Minimum Radius: 9.75 inches. Operates in DC & DCC (use DCMaster for DC Sound). Record & Play Operation - Records and plays back sounds and movements once or repeatedly for automatic operation. 16-bit Sample Rate for exceptional high frequency sound clarity. Alternate Whistle / Horn where applicable for locomotive with air horn and steam whistle - both the main whistle and alternate can be easily played. Adjustable bell ringing interval for faster or slower bell. Numerous user-mappable functions with available keys. Passenger Station Ambient Sounds - Controlled with Function Key. Lumber Yard Ambient Sounds - Controlled with Function Key.
Farm related radio chatter - Controlled with Function Key. Crew Radio Communications - Controlled with Function Key.
Maintenance Yard related radio chatter - Controlled with Function Key. Demo Mode for display and demonstrations.Simple Programming with Integral DCC Decoder. Individually adjustable sound volumes for most effects. Specifications on this page subject to change. The item "N-SCALE BLI 3804 EMD F7A, C&O 7003, As-Delivered, Paragon3 Sound/DC/DCC" is in sale since Wednesday, April 8, 2020. This item is in the category "Toys & Hobbies\Model Railroads & Trains\N Scale\Locomotives". The seller is "onlyengines" and is located in Boiling Springs, South Carolina. This item can be shipped worldwide.