HO F7A/F7B Locomotives Colorado & Southern (ATHG-1631)

HO-scale F7A/F7B Locomotives in Colorado & Southern livery are a two‑unit HO diesel power pair that brings the iconic EMD F‑unit design to life on your layout. The A and B units ride on a heavy die‑cast frame with RP25 wheels for smooth operation, and they feature LED lighting, see‑through cabs with a full interior, a detailed fuel tank, and separately applied detail parts for a highly authentic look. They’re DCC‑ready with Quick Plug plug‑and‑play 21‑pin connectors and body‑mounted scale knuckle couplers (Kadee compatible), all finished in prototype CS schemes for ready-to-run realism.

Roadname refinements for Colorado & Southern include F7 Phase I styling, passenger pilots on the A units, and authentic horn, beacon, and dynamic braking details to match the prototype. Sound‑equipped versions add onboard DCC with SoundTraxx Tsunami2, dual cube speakers, and separate sound boards in the A and B units, with CV‑based customization for MU lashups. Some functions are limited in DC operation, but in DCC they deliver engine, horn, and bell sounds with precise lighting effects, while the Genesis driveline and all‑wheel pickup provide smooth, quiet, low‑speed performance on typical HO layouts.