Yeah, I knew I could just make my own rectifier, but I figured if I can still get my hands on a tube, that'd be the best route.A 5Y3 is still a common enough tube. Better to keep it as is to avoid the B+ arriving before the other tubes are warmed up. Still...
You could replace it with silicon diodes if the peak voltage doesn't get too high for the capacitor during warm up, and you would have to add resistors to keep the B+ voltage from being too high continuously. (I've done it.) IIRC, that one needs about 80 ohms in series with each silicon diode. Just in case the day comes when you can't buy a 5Y3.
Thanks guys! More on this when I get it reassembled with a new tube!
Matt