Printed circuit board for decoder installation in Märklin BR101 locos. Completely assembled with interface, resistors, capacitor and change-over switch for pickup to overhead line.
For decoders with 21MTC interface.

The connections Aux 3 and Aux 4 are amplified in this version, and are passed through 1.2 kOhm resistors to the Aux 3 resp. Aux 4 pads.

If you want to use the connections Aux 3 and Aux 4, you need a decoder without amplified outputs Aux 3 and Aus 4, at ESU these are the decoders without  "MKL" in the designation.
If you have a decoder WITH amplified Aux 3 and Aux 4 connections, use item 8052mtc.

The speaker connection of the 21MTC interface is led out separately.

Operating manual 8053mtc