OPTIONAL ACCESSORIES
Product 121B is a thrust bearing that utilizes a
bronze/oil bearing. It will clear up to a 2 3/16"
diameter mast. It can be bolted to all Hy-Gain crank-
up towers when the rotator is mounted inside the
tower.
3.
With the rotator in its full CCW position, if the
meter is not at its full left position, carefully
adjust the zero (CCW South) position with the
screw directly under the meter to exactly South.
The Tower Mounting/Spacing Kit is a flat plate
equipped with four 0.5 inch standard bushings
drilled to match the hold-down screw holes in the
bottom of a Hy-Gain bell type rotator.
The plate is designed to allow enough clearance
under the bottom of the rotator to clear the rotator
housing bolt heads and control cable.
PRELIMINARY
CHECK AND CALIBRATION
4. Meter Calibration Procedure: Operate the rotator
to its full clockwise position. Adjust the calibra-
tion potentiometer until the meter indicates full
scale to the right. The meter is now calibrated.
Do not adjust the calibration potentiometer when
the rotator is in any position other than full
clockwise.
When the control unit is turned "OFF", the meter
needle will fall to the left "S" position and return to
indicate the rotator position as soon as the control uit
is turned "ON' again. It will not damage the unit to
leave it turned "ON' for extended periods.
IMPORTANT
THERMAL PROTECTION: If the rotator fails
to turn after 4 or 5 minutes of continuous
operation, the thermal switch comes into play.
This protective device in the transformer
automatically shuts off power if the rotator is
used continuously for too long. It will
automatically reset after 10 minutes.
1. Tom the Control Unit Power "ON' with the upper
right "ON-OFF" switch. The meter should be
illuminated and the needle should be to the right.
2.
Depress the brake lever (center) and hold.
Depress the CCW lever (left) and operate the
rotator to its full CCW position. Observe the
antenna cable on the first rotation to insure it
does not get fouled.
To operate this rotator, depress the brake lever, then
depress either the CCW lever or CW lever. Hold both
levers down until the antenna reaches the desired
heading. Release the direction lever, then the brake
lever.
GROUNDING
The tower, or other metal support device, must be
grounded to an
earth
ground at its location. Use
heavy copper cable looped so that if the tower comes
down for any reason, there will be adequate slack to
prevent the ground wire from breaking. Use one or
more 8 foot copper clad steel stakes driven into the
moist earth and fasten the wire securely at the stake
and at the tower.
As mentioned in the "Cautions" portion, the steel
chassis of the control box should be either
grounded to a metal cold water pipe in the house or
back to the electric service entrance box where the
power comes into the house. This normally is
accomplished with the wire of the 3-prong plug
which then depends on the wall outlet being
adequately grounded back to the service entrance
as to the utility ground. If there is any doubt, have
this checked by a licensed electrician.
