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 NOT amplified in this version, and are passed on directly by the decoder.

If you want to use the connections Aux 3 and Aux 4, you need a decoder with correspondingly amplified outputs, at ESU these are the decoders with "MKL" in the designation.
If you have a decoder WITHOUT amplified Aux 3 and Aux 4 connections, use item 8053mtc.

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

Operating manual 8052mtc