HO Scale: EMD GP9 - DCC & Sound - Southern Pacific 'Black Widow'

Athearn Genesis

SKU Road Number Qty
ATHG64239 5692 Sold Out
ATHG64238 5678 Sold Out
ATHG64237 5648 Sold Out
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Athearn Genesis HO Scale: GP9 - DCC & Sound - SP 'Black Widow'

In 1949, EMD introduced the GP7. The basic design followed most diesel switchers with the addition of a short hood instead of an end-cab. The hoods were also full height to better accommodate the diesel engine and mechanical and electrical components.

In 1954 EMD upgraded the GP7 to become the 1,750 horsepower GP9. Externally, the first GP9s were virtually unchanged from the last GP7s. Later versions would include different louver arrangements and the last ones would come without the frame skirting. The GP9 was availalbe with all of the fuel tank, steam generator, and dynamic brake options as the GP7 including "torpedo boats."


Delivered in 1956 as part of an order for 94 SP and 10 TNO units. Used on freight service everywhere on the SP system. All units:

  • Phase II GP9s
  • Newly designed Nathan P-3 horn
  • Newly designed large SP style armrests on cab
  • Standard sunshades
  • Cab wind deflectors
  • Tall drop steps
  • Footboards


  • Black widow paint
  • Front & rear Gyralights (effect on DCC/sound version)
  • Non-operating front & rear red emergency lights
  • Modified fuel tank skirts and stacked SP lettering on long hood as commonly seen on GP9 units starting in the 1960s
  • “Radio Equipped” stencil on short hood
  • Era 1960s+


  • Halloween paint
  • Front & rear Gyralights (effect on DCC/sound version)
  • Non-operating front & rear red emergency lights
  • As-delivered fuel tank skirts
  • Replacement wheel bearing cap on axle #4
  • Era 1958+

#431, #436:

  • T&NO version
  • Black widow paint
  • Dual headlights
  • As-delivered SP lettering on long hood
  • As-delivered fuel tank skirts
  • “Radio Equipped” stencil on short hood
  • Era 1956+


    • Front and rear MU catch boxes with footboard
    • MU hoses
    • Trainline hose
    • Coupler cut levers
    • Drop steps unless noted
    • MU stands
    • "Nub" style walkway tread
    • Bell located behind the right front step
    • Fine-scale handrails for scale appearance
    • Wire grab irons
    • Lift rings
    • Windshield wipers
    • Full cab interior
    • See through cab windows
    • Etched metal radiator intake grilles and fan grilles
    • Two exhaust stacks and plates
    • Air tanks mounted below sill unless noted
    • Detailed fuel tank with fuel fillers, fuel gauges, breather pipes, and retention tanks
    • Blomberg-B trucks with appropriate bearing caps
    • Sander lines
    • Speed recorder unless noted
    • Fully-assembled and ready-to-run
    • DCC-ready features Quick Plug™ plug-and-play technology with both 8- and 9-pin connector
    • Scaled from prototype resources including drawings, field measurements, photographs, and more
    • Accurately-painted and -printed paint schemes
    • Body mounted McHenry operating scale knuckle couplers
    • Genesis driveline with 5-pole skew wound motor, precision machined flywheels, and multi-link drivetrain for trouble free operation
    • All-wheel drive with precision gears for smooth and quiet operation
    • All-wheel electrical pickup provides reliable current flow
    • Wheels with RP25 contours operate on all popular brands of track
    • Incandescent bulbs for realistic appearance
    • Bidirectional constant lighting so headlight brightness remains constant
    • Heavy die-cast frame for greater traction and more pulling power
    • Packaging securely holds for the model for safe storage
    • Replacement parts available
    • Minimum radius: 18"


    • Onboard DCC decoder with SoundTraxx Tsunami2 sound
    • Sound units operate in both DC and DCC
    • Full DCC functions available when operated in DCC mode
    • Engine, horn, and bell sounds work in DC
    • All functions NMRA compatible in DCC mode
    • Excellent Slow speed control
    • Operating lighting functions with F5 and/or F6
    • Program a multiple unit (MU) lashup with lead unit only horn, bell, and lights
    • Many functions can be altered via Configuration Value (CV) changes
    • CV chart included

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