Watch this Video for info : https://www.youtube.com/watch?v=xlXlx4Qz34A&t=2078s
There are several different kits available for your Marklin locomotive conversion.
60971 Decoder Programmer Marklin
Regular Decoders (No Sound)
60760 Low priced 5-pole motor with decoder kit for DCM motors
60906 Decoder for use with "old" Marklin AC motors
60972 Regular mLD/3 Decoder (no sound) 21-pin with harness
60982 Regular mLD/3 Decoder (no sound) with wire harness
60983 Regular mLD/3 Decoder (no sound) with 8-pin plug
21-pin Sound Decoders
60975 Sound Decoder with Steam Locomotive Sounds (mSD/3)
60976 Sound Decoder with Diesel Locomotive Sounds (mSD/3)
60977 Sound Decoder with Electric Locomotive Sounds (mSD/3)
8-pin wire harness Sound Decoders
60985 Sound Decoder with Steam Locomotive Sounds (mSD/3)
60986 Sound Decoder with Diesel Locomotive Sounds (mSD/3)
60987 Sound Decoder with Electric Locomotive Sounds (mSD/3)
Special Interface for Startup Locomotives Sound Decoders
60978 Sound Decoder for Diesel Startup Series Locomotives
60979 Sound Decoder for Electric Startup Series Locomotives
Motor kits to convert "old" motor to DC and 5-pole
60941 US $34.60 Can $46.71 Euro 39.99
High-Efficiency Motor Conversion Set DCM - Drum Commutator Motor
60943 US $34.60 Can $46.71 Euro 39.99
High-Efficiency Motor Conversion Set SFCM - Small Flat Commutator Motor
60944 US $34.60 Can $46.71 Euro 39.99
High-Efficiency Motor Conversion Set LFCM - Large Flat Commutator Motor
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mfx conversion kits
All mfx decoders provide motor regulation with 128 speed steps and multiple adjustable
parameters, plus 16 switched functions. All are programmable by the Central Station, tools
are not required to change parameters.
60921 Conversion kit for drum commutator motor (DCM) AC locomotives, including motor upgrade components.
60922 Decoder for drum commutator motor (DCM) AC locomotives, specifically to upgrade existing digital models.
60923 Conversion kit for older small flat commutator motor (SFCM) AC locomotives, including motor upgrade components.
60924 Conversion for kit older large flat commutator motor (LFCM) AC locomotives, including motor upgrade components.
60931 Decoder upgrade for existing digital locomotives 6090, 60901, 60903, 60904, with speaker and sounds for steam locomotives.
60932 Decoder upgrade for existing digital locomotives 6090, 60901, 60903, 60904, with speaker and sounds for diesel locomotives.
60933 Decoder upgrade for existing digital locomotives 6090, 60901, 60903, 60904, with speaker and sounds for electric locomotives.
mLD and mSD conversion kits, mLD/3 (Märklin LokDekoder) and mSD/3 (Märklin SoundDekoder)
In 2015 Märklin released a new series of retrofit decoders built on a 32 bit architecture, compared to 8 bits of the previous generation. The mLD/mSD generation is faster, has more memory, including 64 Mb memory reserved for sound data, as well as improved sound processing. With 4096 speed steps for the motor, and self calibration, motor characteristics, especially at low speeds, are improved. Along with these decoders, Märklin released the 60971 mDP/3, (Märklin Dekoder Programmer), a USB device which allows for easy programming of parameters of the mLD/mSD decoders as well as customizing sounds and images. The firmware of the decoders can be updated. [6][7][8] The related software, mDT (Märklin Dekoder Tool) is adapted for Windows platforms.
The decoder upgrade kits are not suitable for motors with older field-wound coils. Locomotives with these motors must be converted with the appropriate motor retrofit kits, item numbers 60941, 60943, or 60944. The decoders can be operated with the 6020, 6021, Mobile Station, and Central Station controllers and can be programmed with the protocols MM, mfx, and DCC
The retrofit kits come in 3 different formats. All the mSD3 kits come with 2 speaker options, small and large, except for 60978 and 60979, including one speaker.
For upgrades to fixed circuit board with a 21 pin decoder interface.
60972, mLD3, circuit board with soldered on wires for the locomotive side and a male 21 pin connector for the included decoder.
60975, mSD3, (Steam) circuit board with soldered on wires for the locomotive side and a male 21 pin connector for the included decoder
60976, mSD3, (Diesel) circuit board with soldered on wires for the locomotive side and a male 21 pin connector for the included decoder
60977, mSD3, (Electric) circuit board with soldered on wires for the locomotive side and a male 21 pin connector for the included decoder
For upgrades of 36xxx series Märklin/Trix fixed circuit board locomotives with LED lights.
60978, mSD3, 21 pin connector for the included decoder with pre-loaded Diesel sounds.
60979, mSD3, 21 pin connector for the included decoder with pre-loaded Electric sounds.
For use with existing 8 pin connector in locomotive
60982, mLD3 decoder with soldered on wires for the locomotive side. Male 8 pin connector included.
60985, mSD3 decoder (Steam) with soldered on wires for the locomotive side. Male 8 pin connector included. Separate wires for connection of included speakers
60986, mSD3 decoder (Diesel) with soldered on wires for the locomotive side. Male 8 pin connector included. Separate wires for connection of included speakers
60987, mSD3 decoder (Electric) with soldered on wires for the locomotive side. Male 8 pin connector included. Separate wires for connection of included speakers