CAV DEL type dynamo question

[Mark McKibbin]

Correct me if I'm wrong, but I suspect it won't generate unless you supply current to the field winding from a battery via a "warning light" bulb, like you get with the dynamo installed in the car. If you simply spin it on the bench (with nothing else connected), I don't think it will do very much, even if everything is okay?

Yes I have been running it in the car with the lamp connected, on the bench it has been run as a motor with the F and D terminals linked