Different rectifier tubes can produce a 40-50v change in the power section. You stated you are not getting any sound, is there at least a slight hum or hiss from the circuit/transformers, or is there no noise at all from the speaker? Forgive me for mentioning the obvious, but double checking the speaker and OT connections is a good place to start (at least, for me), if there is no noise at all. If you are using the original build instructions, be sure that your not sending the input signal to ground at V1. That has been an issue for some.