Bob Dobbs EC42 wrote:

On Sat, 02 Sep 2006 10:47:49 +0000, Ron Hardin wrote:

The ANC-4 has linear gain pots, which unfortunately means that the phase
control also changes the gain (strong at the ends, weak in the middle),
which makes searches for the null harder than it has to be.

This statement in addition to being an internally contradicting paradox,
is inapplicable to the ANC-4's operation.
Your description "(strong at the ends, weak in the middle)"
is anything but linear. Plus the phasing isn't linked to the gain,
therefore two separate pots.

No, linear pots are linear in voltage, and you want linear in power, which they are
not.

The result is that the gain is small with the phase centered, and big with the
phase at either end.