[zmil]

Hi Pete

Welcome to the Forum

With Bachmann motors there is a capacitor across the motor circuit that drastically Affects the speed curve when using a Quiet Drive decoder. It causes an over-speed problem. It must be removed from the circuit.

There are more details on the TCS website Here

Hope this helps

Regards

Zmil

 

[zmil]

Hi Pete

Glad you have it sorted

TCS are quite specific regarding the Bachmann Loco's - the Capacitor must be removed or you get out of control speed

The decoder you ended up putting in the Bachmann is probable not as sensitive to capacitors charging and discharging across the motor circuit

Regards Zmil

 

[zmil]

Hi Thunder

Capacitors are across the motor circuit to suppress Interference on TV and radio frequencies

Most decoders have there own suppression circuits built in and do not require any external capacitors
and the external capacitors play havoc with the BEMF causing irregular running

If your track , wheels and pickups are clean your loco should be running smoothly

Remove the Capacitors and you will get improvement.

Regards Zmil