[sdiy] Protective Earth on PC soundcard GND?

[JH.]

> Just checked it.

Thank you, Ingo!

Yes, the 1010LT's audio ground is connected to the
> ground of the computer, and thus to PE.
> IMHO so so much the fault of that sound card. It just connects its
> audio ground to the power supply's ground. The main culprit is the
> computer and its connection from signal ground to PE. But pretty much
> all (desktop) computers do that.

That's what I feared (and also expected).


> Not much of a problem here, since the computer is my only piece of gear
> with a signal-ground-to-PE connection.

Quite different here. All of my Yamaha stuff has PE and GND connected,
and I think all of my Dynacord stuff as well.

Also, I'm using more and more balanced connections (building devices
where PE is on the enclosure and on the connector sleeve, because
I go out balanced (tip/ring) and then grounding the shield is really the
best thing.)

My mixer (Tascam M-2516) has balanced Line inputs (and balanced Mic inputs
of course), but everything else is unbalanced: output, FX send/returns, Tape
machine
connections.


> But seriously: don't disconnect PE from
> the chassis.

Right. Never do that. Never ever.

JH.