TCS 1673 K7D4 for some Kato locomotives

The K7D4 is a 4-function N-scale drop-in decoder designed to fit Kato locomotives. Examples include the following:

Kato:
ACS-64
EMD SPD40F
Ge 4/4 II and III "Glacier Express"


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.

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

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.