[ARC5] BC-230 mic

[AKLDGUY .]

Hi Dennis

Well yes, but an even simpler explanation is that because radiated hash is
picked up only by the braid, the opposite polarity of that hash voltage
appears
on the coax inner wrt the braid. So in effect, the inner carries into the
receiver
whatever the braid picked up.

73 de Neil ZL1ANM



On Tue, Nov 11, 2014 at 3:49 AM, Dennis Monticelli <
dennis.monticelli at gmail.com> wrote:

> Another way of putting it is the differential signal is protected by the
> coax shield from the intrusion of noise but any common mode noise flows
> right down the outside of the braid into the receiver and makes the circuit
> common (usually the chassis) hot with noise.  If the receiver has very good
> common mode rejection (i.e. an excellent RF ground) then no problem but in
> most cases that is not true.  This is why common mode chokes are so popular.
>
> Dennis AE6C
>
>
>