I've been troubleshooting why my dishwasher creates a buzz that comes up either AC + or the Ground into my Rachel amp.
It appears that all (4) speaker terminals and the - RCA short to the IEC ground, but not chassis. I have noticed if I tie the transformer to the chassis of my DAC, hum drops a bit. I probably also have DC on the line as both units chassis/tranny buzz and vibrate.
Is this normal? Or part of the Decware design e.g. floating transformer ground.
i've read this from a well-respected designer; not saying this is good or bad just curious as to design.
Quote:You can sort out easily enough if the equipment is properly grounded by using a DVM. Connect one lead to the chassis and one to the center pin of the IEC connection or power cord. You should measure a short.
Then connect to the ground of the input and output connectors. You should not see a short- but some nominal resistance. I've seen a lot of power amps where input ground and chassis ground are the same thing. Such a unit will be sensitive to the earth ground. I've seen others where the chassis seems to float relative to the inputs. Again, there will be troubles with ground.