Train Control Systems 1446 A4X-KA HO Decoder

This full featured, 4 function, drop-in decoder was originally designed to replace the early Atlas lighting boards. Since then several other manufacturers have adopted the same lighting board style making the A4X an excellent option for any HO locomotive with the large, tab connected lighting board. Included is our auto-adjusting BEMF for outstanding slow speed performance and hassle free set up. Also includes Quiet Drive for super quiet engine performance.

The A4X-KA is four function HO-scale “drop-in” style mobile decoder for Atlas, Athearn, Kato, etc. locomotives.

Examples include the following:

Athearn:

• F59PHI
• F3

Atlas:

• RS-1/RS-3/RS-11
• C424
• GP7

Kato:

• GP35

See the installation pages for a full list of compatible engines!

The A4X-KA includes factory-installed Blue and Black&White wires to use when connecting Keep Alive®.

Back EMF Load Compensation:
Provides superior slow speed control and high performance under load.

Quiet Drive:
Super-quiet motor control for “buzz” free motor performance.

DC Mode:
Decoder will automatically detect DC power. You can also configure how your lighting effects function on DC.

RailCom®:
This feature allows the decoder to talk to the command station. RailCom supports expansion for new features.

Variable Momentum:
Allows you to make custom acceleration and deceleration curves.

LED Support:
This product does not require external resistors when connecting LED’s.

Incandescent Bulb Support:
This decoder can be used with 12 Volt bulbs.

Function Remapping:
Buttons 0 through 12 may be used to control the lighting functions of this decoder.

Programmable Lighting Effects:
Choose from 20 separate user-programmable lighting effects!

Dimmable Brightness:
Configure multiple different brightness levels for your LED’s or incandescent bulbs.

Decoder Lock:
Feature which prevents accidental/unwanted programming while activated.

Airwire™ Compatible:
Fully compatible with Airwire™ operation.

User-Loadable Speed Tables:
Configure custom speed curves and set speed limits.