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B
C.
Antenna
(1)
General
For L-band blade antenna outline drawing, installation procedures, and
mounting dimensions, refer to the manufacture's instructions.
(2)
KA 60
(a)
(b)
(c)
(d)
(e)
(f)
(g)
(h)
(i)
(j)
D.
Programming Options
The VFR code and display brightness can be programmed and their values
stored in EEPROM. To program the VFR code or display brightness parame-
ters please refer to Sections 3.2.2.C. or 3.2.2.F.(1), respectively.
2.3.6
VOLTAGE CHANGEOVER INSTRUCTIONS
The KT 76C is designed to operate with an input voltage of 11-33 V dc. The panel lamps are in-
ternally wired to operate from either a 14 V dc, or 28 V dc panel lighting system, depending on the
connections at the rear connector. Details of this panel lighting option are shown on the intercon-
nect drawing
Figure
2-2. No internal wiring changes are required.
2.3.7
KT 76A/KT 78A TO KT 76C - CHANGEOVER INSTRUCTIONS
If the KT 76C will be installed in place of an existing KT 76A/78A installation follow the procedures
below.
Rev 3, May 2004
ATCRBS TRANSPONDER
Peel backing off the antenna template and apply the template to the
aircraft at the desired mounting location.
Drill or cut the proper size holes for mounting the antenna, then re-
move the template.
Using the antenna as a stencil, draw a line around the base of the
antenna where it comes into contact with the aircraft. Then care-
fully scrape off the paint within the stenciled area. Lightly sand the
bare metal with fine sandpaper to insure the removal of all paint
and protective coatings.
Sand the inside area of the aircraft where the backing plate will be
located to remove chromate or other protective finish.
Apply Alumiprep No.33, or equivalent, following the manufacturer's
directions to cleanse the metal of any residue.
Apply Alodine no. 1001, or equivalent, following the directions on
the container.
Align the backing plate with the holes drilled in step (b). Fasten the
backing plate securely in place, if required for reinforcement.
Mount the antenna using #8 star washer and 8-32 fasteners includ-
ed with the antenna.
Coaxial cable RG400, or equivalent, is normally used on installa-
tions having a cable run of eleven feet or less. For cable runs from
ten to 32.5 feet, use low loss antenna parts, refer to Section 1 para-
graph 1.4.2 or 1.5.
Inspect coaxial cable connector for proper contact, then fasten the
connector securely to the antenna.
IM 006-10545-0003.dwd
KT 76C
Page 2-5
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