What I have here is 240v coming in from the PS, going to the ON/OFF switch. It is tied into the SSB/CW (2PDT) and comes back to the PS on 2 wires for each of those 2 modes. It does also power the filament xmf for the fan & RY-1 supply. The 12Vdc PS I am going to use goes from 100V to 240V so as described above, Actually I was going to tap off the fan supply as my delay cube takes 115V so still deciding where to tap in. One phase to the chassis is where I'm at in the PS currently.