Bachmann's Geep

[torikoos]

...I have an Athearn RTR SW1500,...

Koos, I have a bunch of the current Athearn RTR SW1500 (not the old blue box units). They are great runners without any modifications with ZIMO (preferred) and ESU (some hum) decoders. I did never do any modifications to the PCB etc. other than cutting off the 9-pin decoder cable and plugging my decoder into the 8-pin plug.

Hmmm, I have to have another good look at my SW1500, which is currently equiped with a TCS T4X decoder, previously had a NCE decoder (forgot the model at the moment). It looks like the build in auto BEMF function of the TCS decoder does not like whatever it's getting as feedback from my motor/drivetrain.... it starts very slow but not smooth, then accellerates, but past a certain threshold it suddenly accellerates much more. Slowing down is better. I've tried loads of settings with both decoders I've tried. As said, I will have another look at the mechanics, and then perhaps try yet another decoder....

Koos