Hello all, hoping for a bit of help on a 1956 Wabash Deluxe I just purchased. I have not been able to find a schematic and unless someone here knows where I can find one I kinda doubt I ever will. It came with a non original 4 ohm CTS 15” ceramic magnet speaker. I’m trying to find out what ohm speaker is correct for the original output trans. Will measuring across the OT speaker leads tell me anything?....I did this and came up with 1.8 ohms. Also trem does not work...any tips on first thing to check? I did open it up and clean all pots an$ jacks, have a stash of new old stock tubes around so I did replace a few. It is 100% original other than speaker so I will at least replace filters. Most 8mportantly want to confirm what ohm speaker is correct though...thanks for any help.