A shorter version of the AMD4, the ASD4 is a drop-in for the Atlas GP7, GP9, GP30, and GP35. It has two LED's (one on the front, and one on the back), and it supports to extra functions by way of soldered on leads.
The ASD4 features the TCS exclusive auto-adjusting BEMF.
TCS1393
M4P-3.5" R 1 Amp, 4 Function DCC Decoder - Control Only -- With 3.5" 8.89cm Harness, NMRA 8-Pin Plug, Plug in Reverse Orientation
TCS1453
LL8-LED-KAC 4-Function Drop-In DCC Decoder w/TCS Keep Alive Wires - Control On -- With 2-Pin Connector for KA Unit Fits Life-Like PROTO w/LED Lights
TCS1543
P2K MB1 Replacement Motherboard w/KA2 & 21-Pin Connector -- Fits Life-Like/PROTO Steam Locomotives (Requires 21-Pin Decoder to Operate)
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