HO SD70M Locomotive Union Pacific #3973 (ATHG-1587)

HO-scale Union Pacific SD70M Locomotive, road number 3973, a meticulously detailed model designed to bring the power and presence of UP’s modern freight hauler to an HO layout. This UP-livery SD70M captures the distinctive look of the prototype, with accurate paint, proportions, and a robust chassis built for smooth, reliable operation on standard HO track.

Key features include a heavy die-cast frame for traction, RP25 wheel contours for compatibility with popular brands of track, and body-mounted scale knuckle couplers (Kadee-compatible). Inside, a see-through cab reveals a full interior, complemented by LED lighting, walkways, and finely detailed handrails. The model is DCC-ready with Quick Plug plug-and-play technology and a 21-pin NEM connector; sound-equipped versions use a SoundTraxx Tsunami2 decoder that runs in both DC and DCC with full functions. UP 3973-specific details include replacement equipment doors under the cab in lighter yellow, a K3LA horn, PTC antennas, front ditch lights, a 5000-gallon fuel tank, and a front EMD low snowplow. Minimum radius is 18 inches, with 22 inches recommended for the smoothest operation.