TCS IMF4, N Scale Motor Decoder:
The IMF4 is a N-scale drop-in decoder which is designed for InterMountain F-unit locomotives. Examples include the following:
 
InterMountain:
F3A/B
F7A/B
F9B
 
See the installation pages for a full list of compatible engines!
 
NOTE: This version of the IMF4 is designed for the older style InterMountain frame where the motor is connected to the control board via brass motor feet.
 
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.
 
MSRP is $58.95. (Picture courtesy of TCS.)