TCS Model Trains

The Keep-Alive (KA) devices are used to supply power to decoders during times of power interruption due to dirty track or problematic track work.

The Keep-Alive (KA) devices are used to supply power to decoders during times of power interruption due to dirty track or problematic track work.

The T-1"-21 is a harness with 1" (2.54 cm) wires connecting a 9-Pin JST to NEM21 socket.

This is the 1/4 Watt Axial Lead Resistor (200-Piece Bulk Pack) 560 Ohm by Train Control Systems.

This is the KA3 Keep Alive from Train Control Systems.

This decoder has a 21-Pin connector on the front. It is compatible with any TCS motherboard (which include onboard Keep-Aliv technology) which provides easy connections for attaching your speaker, cam, and for the additional lighting functions (F1 and F2).