Atmosphere said:
The simple test that everyone should conduct for themselves is this: measure the AC voltage between the chassis of each AC powered component and the supply receptacle ground. For equipment that is grounded by a grounded power cord, this reading should be zero. For non-grounded equipment with a non-polarized plug, the reading should be nil with the plug oriented one way - in such equipment, consider replacing the cord set with one with a polarized plug. For non-grounded equipment with a polarized plug, the above voltage reading should be nil. In some cases, it is worth upgrading to a grounded power cord, and connecting the ground to the chassis - only if it is isolated from signal ground.
I did a survey of a number of grounding systems by interviewing the owners and having them do a few tests (as best as I can make out, these were similar to the SR, but none of them were SR units).As usual Ralph, you make utterly and completely perfect sense. The very notion that equipment ground needs to be implement by some convoluted “active” grounding hokum implicates SR as being a purveyor of fallacious merchandise, and worse, the promulgator of carelessness towards electrical standards and safety.
What I found was that in audio systems where a grounding system made an improvement, universally there were also bugs in the way that the associated audio equipment was grounded, which is why the grounding boxes were helping.
My conclusion was that if a grounding box was helping, that was an indication that the associated equipment had design flaws in their grounding implementation.
The simple test that everyone should conduct for themselves is this: measure the AC voltage between the chassis of each AC powered component and the supply receptacle ground. For equipment that is grounded by a grounded power cord, this reading should be zero. For non-grounded equipment with a non-polarized plug, the reading should be nil with the plug oriented one way - in such equipment, consider replacing the cord set with one with a polarized plug. For non-grounded equipment with a polarized plug, the above voltage reading should be nil. In some cases, it is worth upgrading to a grounded power cord, and connecting the ground to the chassis - only if it is isolated from signal ground.