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7. INSTALLATION
7-3
7.2.3 Installation of preamp unit FAX-5 (option)
Small boats may not afford the space to install a long wire antenna. In this case
it is recommended to install the preamp unit with 2.6 meter whip antenna. The
preamp unit can be installed two ways:
• The base of the preamp unit is designed to accept a threaded extension of
one-inch diameter. The pitch of the thread should be 14 threads per inch. The
mast itself should be no longer than 1.5 meters to prevent flexing in heavy
winds.
• Attach the preamp unit to a post with stainless steel hose clamps (option).
1. Fix the preamp unit to the mounting location.
2. Screw the whip antenna onto the preamp unit.
3. If the mast is metallic, run a ground wire (local supply) between the mast and
the ground terminal on the preamp unit.
4. Waterproof the junction and other exposed metallic parts with silicone
sealant.
50
Thread
(14 threads/inch)
Inch Pipe
2.6 m Whip
Antenna
Spring
Washer
Post
Hose
Clamp
(option)
Ground
Spot
Antenna Wire
Screw
Wire Antenna
Fixture
Preamp Unit
INCH PIPE
HOSE CLAMP (option) ON POST
WIRE ANTENNA
How to mount the preamp unit FAX-5
Note 1: An antenna wire several meters in length can be connected instead of
the whip antenna. In this case, install the wire antenna fixture (supplied
with preamp unit) between the antenna wire and the preamp unit as
illustrated above.
Note 2: The preamp unit is powered by the facsimile receiver. To power the
preamp unit, set J23 on the RCV Board (in the FAX-30) to the
"ACTIVE" position. See paragraph 7.4.