solderdude
Grand Contributor
When the pot shaft is connected to the groundplanes (top and bottom side it seems) and the volpotnut has a ring on it that pierces the anodized part at least the front panel is grounded.
It would be easy to create a good connection from the frontpanel to the enclosure as well. The frontplate is glued on it later.
In this case the enclosure and shaft are connected to the ground.
Personally, when the switches are merely soldered onto pads for sturdyness I would also connect those to the groundplane.
You don't want any sparks on the inside of the enclosure. It should take the lowest resistance path which is the groundplane.
With these measures and the correct DC protection the amp is safe as hell (safer than most others !)
It would be easy to create a good connection from the frontpanel to the enclosure as well. The frontplate is glued on it later.
In this case the enclosure and shaft are connected to the ground.
Personally, when the switches are merely soldered onto pads for sturdyness I would also connect those to the groundplane.
You don't want any sparks on the inside of the enclosure. It should take the lowest resistance path which is the groundplane.
With these measures and the correct DC protection the amp is safe as hell (safer than most others !)