30 How-to: Using a 21-pin decoder in a locomotive with an 8-pin
Accessory wire harnesses match those included with Digitrax DH series decoders. Extra harnesses allow you to share DH Series decoders among several locos in your fleet. Dummy plugs allow for non-DCC operation of harness equipped locomotives.
Digitrax - HO DCC Decoder Wire Harness, 3.2 8-Pin - DHWHP
36-568A Bachmann E-Z Command 6 Pin DCC Loco Decoder (with brake
DCC Concepts DCC-AD218-63 6 function DCC 21-pin to 8-pin
DCC Concepts DCD-ZN218.6 Zen Black Decoder 21 Pin MTC and 8 Pin
R7322 HM7000 - 21TXS - BLE decoder (21 Pin - TXS Sound)
21-Pin to 8-Pin Decoder Adaptor Board (Wired DCC Harness with
MRC - DCC (Digital Command Control) Motor Control Decoder
DCC Concepts DCC-8PF3 - Decoder Harness 8 Pin Female - 200mm (3
Special feature: Two pads for speaker wires are also provided, making it perfect for DCC sound installations. If you have speakers already soldered to
8-Pin Decoder to 21-Pin Socket Adaptor (DCC 8 Pin NEM65 Socket to 21 MTC Socket)
Digitrax DZ126IN 1 Amp Z / N / HO Scale DCC Decoder With 6 Pin NEM
DCC Concepts DCPDCC21863 6 Function 21 To 8 Pin Adapter - Pack of
Hardwiring a 21 pin loco - Wickness Models