Received my B6 yesterday and had a chance to try it out this afternoon. Beautiful locomotive. Runs very smoothly and the low speed is very good.
I hooked up the whistle/bell switch, between my post-war ZW and the track, following the instructions. Unfortunately the bell will not sound. If I slide the switch to the bell position and turn the track power on, the circuit breaker I installed between the transformer and track trips instantly. Reversing the wires doesn't help. The whistle does work though. However, the whistle works without the whistle/bell switch wired into the mix.