The 6090 decoder was the first for Märklin H0 locomotives that used electro-magnetic feedback to create a speed regulation that keeps the loco at constant speed both up and downhill, and also independent (to a certain limit, of course) of the load of the wagons. This is also the first H0 decoder from Märklin that allows acceleration/deceleration and maximum speed to be set.

The 6090 is a complete set with a special DC motor to retrofit locos with the DCM motor. 

The set contains this
  • A permanent stator magnet
  • A new motor shield
  • A special 5-pole rotor
  • The decoder
  • 2 inductive coils (not resistors, even if they look like that)
  • A set of 601460 brushes
  • A small plastic "tool" for setting the address and adjust the speed/acceleration potentiometers (not in picture)
  • 2 small plastic cable insulators (not in picture)


The features of the decoder are

  • Adjustable acceleration/deceleration
  • Adjustable maximum speed
  • A function that is digitally controlled
  • Load-dependent speed regulation

The decoder has the chip version 701.13 aboard, and this means it doesn't recognize the absolute direction component in the "new" Märklin data format. But it runs well anyway.


Standard installation

In the standard installation, the controllable function is used to turn the light of the loco on/off.



Custom installation

Here we use the controllable function to switch TELEX couplers, or a smoke unit. To still have lights, diodes (1N4148) and Zener-diodes (BZX83C2V7) are inserted. The lights are connected to the red cable (track power) and are constantly on.

 

 

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