[Lowfer] 8 ft Square Loop

John Andrews [email protected]
Thu, 31 Oct 2002 11:00:11 -0500


Alberto,

> That's a question I have always asked to myself... is it better to leave
the
> primary of the transformer and the single-turn loop floating or to center
tap
> it and to connect the center to ground ?
> Wouldn't leaving it floating achieve a better noise immunity, just because
> you are now not anymore concerned with imperfect balancing (which, more or
less,
> always is the case) ?

The best noise immunity would come from leaving it floating. If you are
concerned with providing a static discharge path to earth, I would suggest
center-tapping it and running that point to earth through an inductor. That
provides a DC connection with less effect on balance.

In case of a direct lightning hit, focus the fire extinguisher on the
inductor.

John Andrews, W1TAG