The Vaquero, and others, set at full negative with the ground balance is
accepting everything. That increases depth.
But, we don't hunt in the air, we hunt in whats under our feet.
The ground can be seen by the Vaquero, and will respond to it.
The ground must be made to be more or less invisible to the Vaquero.
We do that with the Manual Ground Balance Control. ( MGB )
We use the MGB to discriminate out the ground so that it is more or less
invisible to the Vaquero.
The MGB is more or less just a Master Discriminator that works on both
the All Metal and the Disc Mode. It is much more sensative than the
discriminator that the Disc Mode operates on.
The more positive we have to set the MGB to eliminate the ground, the
less depth that may be achieved, which depends on many factors, other
than the MGB setting.
Happy Hunting,