'62 Knight span master & '40 Silvertone 1561

[bob91343]

Those sets were a hodge-podge of whatever parts were available. They had war surplus, mfr's overruns, old stock, and whatever. So they made up a special transformer to accommodate the strange output tube, of which they probably got a few thousand for almost nothing.

When you are done, it will probably work fine, but be careful because I suspect finding a replacement output tube may be a challenge. Be SURE to replace the grid coupling capacitor with a new one.