5W PP Princeton reverb EL91. FINISHED (nearly)
schematics for Rivera era Fender amps
Princeton PPRI 65 and 68 Custom Princeton Reverb Schematic
Free Fender Diagrams, Schematics, Service Manuals :: Schematics Unlimited
Minutes after that you have two red-plated and destroyed 6V6 valves, and perhaps ancillary damage to the output transformer, power transformer, and rectifier valve if you're using one.
Here's the place you can go to ask tube amplifier questions.
Choosing the 2 ohm output with a 8 ohm speaker will attenuate the volume a lot.
I promise the tables will still be there after you finish reading.