Hi everyone, After abandoning (for now) the mystery PT and OT I found in the trash, despite great help from forum members, I'm now starting to source parts for a diode rectified 5f1 build. I already have a Hammond 1760C OT to go along with an 8Ω 12" speaker, and the next step is ordering a bespoke PT from a local shop. I know that SS rectifiers upset the vacuum tube gods, but it really simplifies the logistics and dramatically lowers the costs in my part of the world. What I'm not sure about is the specification for the PT for this specific build and any additional variables that should be considered for this type of rectification. Here are some problem points - What B+ voltage should I be aiming for? I see this specified in different schematics and layouts ranging from 340V to 370V. Why is that? How do I determine the PT's secondary AC voltage for that B+ through a bridge rectifier? Being a total layman to this world, I'm a bit confused by the different calculations for the different types of voltages - RMS, average, peak, etc. What should be the PT rating? How many amps for each winding? What other rating should be taken into account? What diodes should be used? What rating? Should they be UF? What about the filtering caps and resistors? How are they affected by this rectifier? I also see different capacitance values between schematics. Why is that? Should I insist on ordering a PT with a 6.3V winding center tapped, or can I get the same performance with an artificial CT? Should I use a standby switch when implementing a SS rectifier to compensate for the lack of gradual startup? What changes should be made in order to use the 8Ω winding on the OT? I'm sure that there are a lot more questions that I don't even know that I should be asking about this, so any information, suggestion or comment will be greatly appreciated. Even a friendly RTFM.