INSTALLATION MANUAL OPERATION MANUAL
KANNAD 406 AP
PAGE: 209
JUL 24/2013
Locate a position on the fuselage according to §
A double plate may be necessary for the antenna to meet rigidity specifications
in Section
(2) RTCA DO-204a Requirements for ELT location page 208
A 9 Kilogram force (20 pound force) applied in all direction should not cause an
appreciable distorsion in the aircraft skin.
Each of the approved antennas requires a ground plane. On fabric-covered
aircraft or aircraft with other types on nonmetallic skins, a ground plane must
be added. This can be accomplished by providing a number of metal foil strips
in a radial position from the antenna base and secured under the fabric or wood
skin of the aircraft. The length of each foil radial should be at least equal to the
antenna length and width at least 1 inch due to the diameter of the antenna. The
ground plane must be connected to the shield of the antenna connector.
Figure 206:Antenna ground plane for non metallic aircraft
According to the antenna to be installed, use the appropriate outline drawings
and drilling masks to determine the hole patern and drill size (
SCHEMATICS & DIAGRAMS, page 501
).
Fabricate a 50 Ohms coaxial cable long enough to reach between the ELT
installation location and the antenna location.
IMPORTANT: The length of the coaxial cable should not exceed 2.7
meters (9 ft) for a standard RG58 or equivalent coaxial cable. If the cable
length exceeds 2.7 meters, a low loss cable of attenuation less than 1
dB@400 MHz must be used (See Important notice,
).
Fit both ends of coaxial cable with a waterproof Male BNC connector (not
supplied), reference RADIALL R141007 or equivalent.
Connect one Male BNC connector to the antenna Female BNC socket.
