For those that are interested, there is a table of "pickup" (handle part way) and "holding" (handle all the way) voltages for all Postwar Lionel multitrol transformers on the pages below. These pages come from the 5F test bench instructions.
It must be noted that the voltages are specific to the dummy load that is built into the 5F test bench. Those voltages change with the load, which is the reason a tender alone often won't work, and sometimes not even a lightly loaded locomotive will provide enough load.
I built the 5F whistle test out of surplus radio components years ago. I will try to look up the load later.
The charts also list circuit breaker loads and trip times.
When I look at the long trip times, it reinforces the idea that external fast acting circuit breakers are needed on all the larger transformers. (I use them on ALL transformers).
