HO F7A / F7B Locomotive Set with DCC and Sound ATSF #218C, #235B (ATHG-1728)

Two-unit HO scale F7A/F7B Locomotive Set in ATSF freight livery with road numbers 218C and 235B, designed to deliver authentic diesel power on a hobbyist’s layout. The set features onboard DCC and SoundTraxx Tsunami2 sound with dual cube speakers and dedicated sound boards in each A and B unit, operable in both DC and DCC (with NMRA-compatible functions in DCC). It showcases see-through cab interiors, detailed fuel tanks with gauges, etched metal details, LED lighting, and a heavy die-cast frame for realistic presence and traction. DCC-ready Quick Plug 21-pin NEM connectors and a recommended minimum radius of 18 inches (22 inches preferred) ensure modern layout compatibility.

On the rails, these F7s use a Genesis driveline with a 5-pole skew-wound motor, precision flywheels, and a multi-link drivetrain for smooth, quiet all-wheel-drive performance and reliable electrical pickup. RP25-wheel contours promote compatibility with popular HO track, and body-mounted McHenry scale knuckle couplers (Kadee-compatible) provide prototypical operation in MU lashups. Prototypical details include trainline and MU hoses, windshield wipers, wire grab irons, and lit signals or beacons where applicable; a “Primed for grime” option offers a ready starting point for weathering, and a CV chart in the box supports easy sound and performance tuning while secure packaging protects the model during storage.