07-20-2016, 07:21 AM
So I'm currently working on a VT-40 distortion model re-build myself.
On my amp the input jacks are actually insulated from the chassis so it's not actually grounded at that point. The shield on the input wiring is actually grounded on both end-points, therefore grounding the input jacks onto the PCB. I have completely traced all the wiring in my amp and it is indeed only grounded at the pre-amp/power-amp input/output jacks. The power tubes are also grounded to that point as is the OT.
So it does actually use a star grounding scheme.
My amp has a lot of loud crackling and popping noises which as been narrowed down to a PCB issue. My plan is to replace the PCB with a hand-made turret board, replacing all the components.
On my amp the input jacks are actually insulated from the chassis so it's not actually grounded at that point. The shield on the input wiring is actually grounded on both end-points, therefore grounding the input jacks onto the PCB. I have completely traced all the wiring in my amp and it is indeed only grounded at the pre-amp/power-amp input/output jacks. The power tubes are also grounded to that point as is the OT.
So it does actually use a star grounding scheme.
My amp has a lot of loud crackling and popping noises which as been narrowed down to a PCB issue. My plan is to replace the PCB with a hand-made turret board, replacing all the components.