GAP Titan Посібник - Сторінка 6
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Друкувати сторінкуIMPORTANT The length of the Counterpoise Hoop controls the center frequency on 40m.
The longer the Counterpoise wire is, the shorter the Dacron rope is and the lower the
resonant frequency will be. Likewise the shorter the length of the Counterpoise Hoop the
higher the resonant frequency will be and the longer the Dacron rope will be. Adjust the
Counterpoise Hoop and check the frequency with your VSWR meter on 40m. Adjust the
length to suit your preference on 40m. Keep in mind that as you adjust the overall length
of the Counterpoise hoop wire the loop created between the split bolt and the ring terminal
on the Dacron should remain about 2"
5.4 POLE MOUNT ASSEMBLY-REFER TO FIGURE 7
A) Locate the 3"x12" aluminum plate, the six U-bolts and twelve nuts.
B) Insert the U-bolts into the plate as shown in figure 7
C) Locate the six collar insulators. Place each under a U- bolt.
D) Finger tighten the nuts on the ends of all the U-bolts.
E) Using a 7/16" wrench tighten the U-bolts until the collars are just held in place.
F) Take the assembled unit and slide it over the base of the antenna. They should slide
freely. If not, they are overtightened and the U-bolts should be loosened.
G) Continue to slide this unit up the base, until the collar on the first unit butts against the
lower portion of the antenna. Tighten the nuts securely on the top unit.
H) Make sure the nuts that hold the Lower section to the mount plate assembly are tight.
I) Locate your 11/4" mast. Carefully slide your mast thru the 3 vacant insulating collars until
your mast pipe is flush with the top of the mount plate assembly. Tighten all U-bolts with
a 7/16" wrench.
5.5 COAX TAIL
A) Bring the coax tail out through the exit hole in the side of the Lower Section. YES, it is
important for the coax to exit through the hole in the side. Do not bring it straight out
the bottom. Locate the PL259 connector with adapter. Attach the connector to the
coax. See the ARRL Handbook if you are unsure of the procedure. In your final
installation, make sure the connector does not touch your support mast.
B) If properly connected, an ohm meter will read "open" when placed from centerpin
.
to shell
NOTE If your pipe is slightly oversized the PVC collars have been slit to allow for
expansion. Operating without these insulators can affect performance.
PG13
6.1 GENERAL
A ham band transceiver and SWR meter are required for these tests. It is recommended that
CHAPTER 2: ANTENNA MOUNTING
2.0 General
The TITAN will accommodate a variety of mounting situations, some of which
are described below. The preferred mount is a pole mount. It is simple and
avoids the hazards of a roof top installation. Electing to roof mount the antenna
is solely your decision and extreme caution should be exercised.
If you elect to elevate the antenna, always pre-test the antenna on the ground
first. See Section 6.0 Locating a loose connection when the antenna is on top
of a 40' mast is not easy!!
2.1 Pole Mounting
The TITAN is designed to be pole mounted. A mount plate assembly has
been provided to attach the TITAN to a pole of your choice. It is recommended that you
select a very heavy gauge steel pipe. The outside diameter of which should
be 1.25". This pole may be attached to the side of a structure ie house
or garage for additional support. If you elect to side mount, be certain your pole
extends above the roof line to allow clearance for the Counterpoise hoop. Three foot
clearance is typical.
If you elect to mount the TITAN on a pole in the yard, the pole should be mounted
in an 18" diameter hole 3 feet deep or more and filled with concrete. It is far
easier to erect the antenna with your support pole attached, rather than trying to
lift the TITAN onto your support pipe. Thus your support pole should be such that
it is removable from the concrete. To achieve this, procure a 3' length of 1.25" schedule
40 PVC. Make sure it will sleeve over your support pipe, if it is not large enough slit the pipe
lengthwise and slide it over your pipe. Cover the slit with
tape and place the PVC covered pipe in the 3' hole and fill with concrete. When
the concrete has set remove your support pipe. You can now drop your support pipe
into the hole you created by your PVC form.
2.2 TOWER MOUNTING
The TITAN may be mounted to a tower. Do not clamp directly to the tower. Use
the Mount Plate Assembly to insulate the TITAN from the tower itself or the
support. The TITAN must be placed at the top of the tower and not parallel with
it. You may experience reduced bandwidth on a band if you tower mount the
TITAN. This is generally a result of the tower exhibiting a resonance for that frequency.
2.3 TRIPOD/CHIMNEY MOUNT
The TITAN may be mounted in a tripod or to a chimney mount. Use the mount plate
assembly to insulate the TITAN from the tripod or chimney mount.
CAUTION The TITAN and mount are in excess of 29' tall. Under no circumstances
should a tripod or chimney mount exist without guy ropes. Guy the Antenna!
PG 4