[sdiy] Magnetic Bug squashed !

[Magnus Danielson]

From: "John L Marshall" <john.l.marshall at gte.net>
Subject: Re: [sdiy] Magnetic Bug squashed !
Date: Sun, 27 May 2001 09:42:35 -0700

> > I've seen people trying the same idea in RF environment (say signals
> > of several 100 MHz) - not a good idea!
> 
> In RF, move a quarter wave length from ground and it not ground any more.

Well, it's not even that easy...

When you have bad HF ground to the chassi you are bound to have bad
impedance/reflections and you will also be sensitive to external
properties, such as just HOLDING the cable with your hand.

> > You don't want to learn how ridiculously small currents it takes to
> > make the heart give up.
> 
> Some claim as low as 5 mA. Fortunately, skin is not a good conductor,
> usually.

Right... it's in that neightborhood. Now, 5 mA is almost nothing for
us fellows...

> > I wrote a little thing on grounding over at SAS, maybe it's time to
> > translate it to english and drop it on this list...
> 
> Share it. All of us will benefit.

I'll work on it. Patrik - bump me in the head!!!

Cheers,
Magnus