INSTALLATION GUIDE
1. The antenna should be located at least 0.6 m (2 ft) away from
other antennas and reflective surfaces on the airframe (e.g.,
vertical stabilizer, landing gear, etc.). A good electrical
connection must exist between the antenna mounting hardware
and the metal frame or skin of the aircraft.
2. Composite or Wood Aircraft - Create a “ground plane” on the
inside of the aircraft skin by preparing two 1.2 m (48”) long, light
gauge copper wires, perpendicular to each other and intersecting
at their mid-point (forming an X). Strip away insulation at this
intersection if using insulated wire. Locate this on the inside of
the aircraft skin where the antenna will be mounted externally.
Run the wires forward, aft and side to side along the inside wall
and secure in place. Attach the (X) intersecting point to one of
the antenna’s mounting bolts, making a good electrical
connection. This is similar to a communications antenna you
would see at a ground installation; a vertical radiator with four
ground plane “radials” equally spaced around the base.
3. Using the template provided, drill four mounting holes and one
hole for the connector. The template is not symmetrical; note
the ‘front’ and ‘rear’ on the template.
4. Mount the antenna by placing the rubber pad provided between
the antenna base and aircraft skin, and the back-up plate
provided inside the aircraft. Insert hardware provided as shown
below and tighten all mounting screws securely to provide a
good electrical contact. The antenna must be properly grounded
by means of the countersunk washers biting through the painted
surface under the mounting screw heads.
5. Using RG-400 or similar 50 ohm coax cable (not supplied), attach
a BNC connector to one end. The other end of the cable must
have a connector attached to match the connector on the radio.
6. Place the cable with the connectors attached between the
antenna and the radio. Test the antenna by connecting an in-line
wattmeter between the transmitter and the antenna. VSWR
should be 3.0 to 1.0 or better for satisfactory operation.
SPECIFICATIONS
TA17 –VHF Com Antenna - angled
The TA17 is a general aviation antenna designed specifically for
mounting to the underside of an aircraft, providing an excellent radiation
pattern for air-to-ground communications. It has a 4-bolt mounting base
and is low in profile.
The antenna is designed to operate at speeds up to 350 mph and
altitudes up to 50,000 ft. It has a drag force of 0.66 lb @ 250 mph.
The TA17 is certified to FAA TSO-C37d and TSO-C38d.