06-21-2016, 08:08 PM
Hey guys, I'm bumping this, I really do not want to beat this horse to death more than it already has been but my v4 has been badly mucked around with in the past and I could definitely use some help from those knowledgeable. Does anyone possibly have an actual wiring diagram that would show how and where the grounding goes in this thing ('76 distortion model), or alternately, can anyone give me an idea as to how the grounding is supposed to go? Everything I've researched leads to having one and only one ground going to the chassis to avoid ground loops. That said, the schematic indicates that both input jacks and the pre/power interface jacks are all individually grounded to the chassis. That's 3 chassis ground connections to the preamp board which I understand is not a best practice. I'm also confused with the electronic "system" ground vs. the chassis ground. Where are the power tube cathodes grounded to? Where does the OT secondary ground go to? So many brown wires (at least I think that's what they're "supposed" to be), so many PCB soldering pads to choose from. Any and all help really appreciated.