GTN 625/635/650 TSO Installation Manual
190-01004-02
Page 4-6
Rev. F
4.7 Installation Materials Required but not Supplied
4.7.1 Accessories Required but not Supplied
The following installation accessories are required but not provided.
4.7.2 Materials Required but not Supplied (New Installations Only)
The GTN is intended for use with the standard aviation accessories. The following items are required for
installation, but not supplied:
Wire (MIL-W-22759/16 or equivalent)
NOTE
If MIL-W-22759/18 wire is utilized because the smaller insulation diameter works better
with the high-density connectors used in the GTN, care must be taken to adequately
support and protect the wiring due to its thinner insulation.
Shielded Wire (MIL-C-27500 or equivalent)
Mounting Screws (8 minimum – MS24693 Screw, Machine, Flat Countersunk Head 100°, Cross-
recessed with .1380-32 UNC-2A Thread, Corrosion Resistant Steel)
Push/Pull (manually resettable) Circuit Breakers
Tie Wraps or Lacing Cord
Ring Terminals (for grounding)
Coaxial Cable (RG-400, RG-142B or equivalent – Refer to Section 4.11 for additional
information)
Item
Requirements
COM Antenna
(GTN 635 and 650 Only)
Meets TSO-C37( ) and C38( )
or
TSO-C169( ). 50
, vertically polarized
with coaxial cable
NAV Antenna
(GTN 650 Only)
Meets TSO C40( ) and C36( ). 50
, horizontally polarized with coaxial
cable. Note that if the NAV antenna is a combined VOR/LOC/GS antenna, it
must meet TSO C40( ), C36( ), and C34( ).
Glideslope Antenna
(GTN 650 Only)
Meets TSO-C34( ). 50
, horizontally polarized with coaxial cable or low-
loss splitter used with the VOR/LOC antenna.
Headphones
500
nominal impedance
Microphone
Low impedance, carbon or dynamic, with transistorized pre-amp
GPS Antenna
See Section 4.2.1 for options.
Summary of Contents for GTN 625
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