[morzh]

Keith

Even if your speaker were in excellent shape and even knobs were present, forget about trying to plug it and see if it works.

You can start with seeing if all the wiring needs replacing (likely if it is rubber-insulated one) or not, and upon deciding that you have to:

1. Do the re-capping (change all capacitors except for mica ones)
2. re-carbing (changing all OUT-OF-SPEC resistors).
3. Making sure your transformer is OK and can output AC,
4. Test your tubes.

In the meantime you can send your speaker for being tended to, see the resources listed in this site (or others - they more or less list the same ones as there are only so many of them). I had good luck with The Speaker Shop, some people praise John's Vintage Radios in NJ.

Take it slow, enjoy it and learn in the process.

And - welcome!