the transformer im using has 305vac secondaries and i was told i had to put some zeners in the b+ after the first filter cap. I referenced the fx loop layout because that is what i intend to build it can be found here http://www.ceriatone.com/images/mods/TMBceriatoneEffect-Loop.jpg

in the fx loop layout which is the first b+ filter cap. is it the can cap? i am new to tube amp building but i think i can follow the layout well . i used to work as an electrician so i am aware of the high voltage dangers.