[Mondial]

Brenda, I am not sure how well that transformer would work in his set. The Hammond transformer has a 1 to 3 step up ratio for the usual driver plate to class A push pull grids.

The type 19 tube operates in class B and requires that the tube grids be driven positive. Since the grids draw current when positive they present a fairly low impedance load to the transformer. Usually a Class B driver transformer has a step down ratio of 2 to 1 or even 3 to 1.

Maybe he would be better off if he could find a replacement from another junk radio using a 19 output tube or get one from Playthings of the Past. I don't think small replacement Class B driver transformers are currently being made.