GAP Titan Manual - Página 2
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Imprimir páginaREAD THE SAFETY NOTICE ON PAGE 1 BEFORE CONTINUING
CHAPTER 1: SITE CONSIDERATIONS
1.0 General
Ideally, it is best to locate the TITAN in a clear area, away from wires, metal buildings, fences and trees.
As a practical matter, many amateurs must compromise in locating their antennas. This section contains
specific guidelines to assist in making those compromises.
1.1 Site Safety
A) Reread the safety notice now. Stay away from power lines, they are life threatening.
B) Choose a site that it is not easily accessible to people or pets.
CONTACT WITH THE ANTENNA IS DANGEROUS AND CAN BE FATAL.
The counterpoise rods and the rest of the TITAN may be at high RF potential during operation. If it is not
possible to site the TITAN to prevent access, then it should be placed high enough such that people
cannot reach it or it should be surrounded by a fence.
1.2 Nearby Wires and Antennas
A) In general, any vertical antenna can exhibit mutual coupling with any other vertical metal structure or
wire if placed within a few wavelengths or the structure approaches resonance at the operating
frequency.
B) Try to avoid metal objects which may be within 30' of the proposed GAP installation site. These may
include wires, towers, down spouts, screened porches, feedline from other amateur antennas or TV
antennas, metal pipes on your property or adjoining properties. Naturally, if these metal objects are
short you can get closer than 30'.
C) Nearby horizontal wires or structures may affect the performance of a vertical antenna, but they are
not as likely to, as a vertical structure is.
1.3 Buildings
A) It is best to locate the antenna as far from the home as possible, to minimize interaction with house
wiring, and RFI to consumer electronics.
B) Metal walled or roofed buildings can affect antenna operation. If you have no choice, your GAP
should be located at a corner of the building, rather than broadside. In any case, the TITAN should
be tested first away from the building. See Section 6.0.
C) Stucco buildings may have metal mesh in their walls and should be viewed as a metal structures,
until proven otherwise.
D) Mobile homes or RV's are a special case, which involve individual experimentation. Test the
antenna on the ground before attempting installation near or on the RV. Mounting above the
roof line is preferred.
1.4 Guying
The TITAN is designed to withstand substantial winds unguyed. Guys are a form of insurance, however,
which we recommend. Four nonconductive guy ropes should be fastened above the center insulator.
Use a stainless clamp or optional guy clamp available from GAP. Leave some slack to allow for
temperature changes. Guys should be used for roof mounting. Do not rely on a chimney mount or
tripod to support the TITAN, even moderate winds can produce enough force to damage the mount or
the chimney.
PG5
CHAPTER 3: ASSEMBLY
6.0 PRETEST PROCEDURE
It is always best to test the TITAN at ground level before elevating it. Pretesting is not difficult
and may save time and effort in the total process. This is particularly true if the antenna is to be
significantly elevated.
A) Locate an open space.
B) Obtain an 11/4" pipe 5' long.
C) Attach this pipe to the TITAN see section 5.4.
D) Obtain 3 lengths of rope 25-30' long.
Attach ropes just above the GAP center insulator.
F) Dig a small hole or insert a small diameter tube or large screwdriver in the ground,
G) With help raise the antenna until it is vertical.
H) Place your 5' pipe in the hole or over the screwdriver or tube, this will keep the base in place.
I) Secure the temporary guy ropes.
J) Complete the hoop assembly see section 5.3. For this test it is not necessary to put screws into the
Counterpoise rods.
PG12
FIGURE 7