DCC 21-pin to 8-pin adaptor converter. For locos with 21-pin sockets to use an 8-pin decoder | Global Sources
30 How-to: Using a 21-pin decoder in a locomotive with an 8-pin socket - YouTube
Railroad Line Forums - Identification of Decoder in Bach H-4
36-557 Bachmann E-Z Command 1 Amp 4 Func. 21 Pin DCC Decoder (DC Compatible) | The Model Centre
DCC Page 1
10PCS DCC 21pin to 8pin adaptor/converter. For locos with 21 pin sockets to use an 8 pin decoder 860004/LaisDcc Brand|decoder dcc|dcc locodcc loco decoder - AliExpress
AL-16 A 8-21 Pin DCC Decoder Adapter | eBay
8-Pin to 21-Pin Decoder Adaptor (DCC NEM652 to 21 Pin MTC Socket)
Bachmann 36-569 21 Pin DCC Decoder (Suitable For Class 90): Amazon.co.uk: Toys & Games
Zen Black Decoder: 21 pin MTC and 8 pin connection. 6 full power functions.
DCC Assistance
Digitrax SDH186MT 21 Pin DCC Sound Mobile Decoder With Premium 8-bit SoundFX for sale online | eBay
Bachmann 36-557 E-Z Command 1 Amp 4 Func. 21 Pin DCC Decoder DC Compatible - Model Railways Direct
8-Pin Decoder to 21-Pin Socket Adaptor DCC 8 Pin NEM65 Socket to 21 MTC Socket Decoders Collectables
Connector Wiring Diagrams | Train Control Systems
SBS4DCC - The Infamous 21MTC Interface Connector
November 2014 Trolleyville Times
53614 ESU LokPilot Standard DCC decoder, with 21-pin plug Part # = ESU-53614 - Yankee Dabbler