TMCC signal(?)

TMCC locomotives must detect the TMCC signal when they power up.  If no signal is detected, they power up in conventional mode.  The fact that the sounds come on right away means the Hudson is coming up in conventional.  I suspect that you have the TMCC Command Base and the transformer (probably a power brick, so that track power will come on instantly at power-up) plugged in so that they both come on at once.

When you do your restart, the locomotive is powering up with the Command Base already on.

Try applying power to the Command Base first, then adding track power and the Hudson should behave itself.

@Bob posted:

TMCC locomotives must detect the TMCC signal when they power up.  If no signal is detected, they power up in conventional mode.  The fact that the sounds come on right away means the Hudson is coming up in conventional.  I suspect that you have the TMCC Command Base and the transformer (probably a power brick, so that track power will come on instantly at power-up) plugged in so that they both come on at once.

When you do your restart, the locomotive is powering up with the Command Base already on.

Try applying power to the Command Base first, then adding track power and the Hudson should behave itself.

That did it!  I *think* this is the only engine I have that behaves this way, but it's working perfectly now.

Thanks so much!!