On Sat, 9 Dec 2006 10:49:08 +0100, "Antonio Vernucci"
wrote:

Do you appreciate the difference?

Hi Tony,

Nope.

The meter is always in a condition where current is flowing given that
it shares the cathode load. Paragraph 5-5 says quite clearly how to
set zero for a zero signal condition. Basically, the design reveals
an admission that there is no "zero" in the first place (merely a
minimum).

Aside from that, there is no need to be concerned about a meter
reading for a receiver that is turned off. In short, any attempt to
force a mechanical zero would be negated by the "electrical zero" set
and S-9 calibration.

73's
Richard Clark, KB7QHC