Thanks for all of this great information.
I will turn on the electricity in all of the power blocks, put my two largest engines on the two ovals in the layout, put my flashing light caboose on the side track, turn the throttle all of the way up so that the engines are running fast, . . . and while they are all running, test the voltage again.
I'll let you know what it reads.
Thanks again,
Mannyrock