Garmin GTR 225 User Manual

190-01182-02 GTR 225/GNC 255 TSO Installation Manual
Rev. F Page 4-2
4.3 Optional Reference Material
Table 4-4 Optional Reference Material
4.4 Installation Materials Required but not Supplied
4.4.1 Accessories Required but Not Supplied
The following installation accessories are required but not provided.
4.4.2 Materials Required but Not Supplied (New Installations Only)
The GTR/GNC 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)
 Shielded wire (MIL-C-27500 or equivalent)
 Hardware
 #6-32 x 100° flat head SS screw (MS24693, AN507R or other approved fastener
(6 ea.))
 #6-32 self-locking nut (MS21042 or other approved fastener (6 ea.))
 Push/pull (manually resettable) circuit breakers
 Tie wraps or lacing cord
 Ring terminals (for grounding)
 Coaxial cable (RG-400, RG-142B or equivalent. See table 4.8 for additional information)
Item Garmin P/N
GDU 620 Installation Manual 190-00601-04
GNC 255A/255B Pilot’s Guide 190-01182-01
GTR 225/225A/225B Pilot’s Guide 190-01182-00
Item Requirements
COM antenna
Meets TSO-C37( ) and C38( ) or TSO-C169( )
50
, vertically polarized with coaxial cable
NAV antenna
Meets TSO C40( ) and C36( ). 50
, horizontally polarized with
coaxial cable
If the NAV antenna is a combined VOR/LOC/GS antenna, it must
meet TSO C40( ), C36( ), and C34( )
Glideslope antenna
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

Garmin GTR 225 Specifications

General

Input Voltage	11-33 VDC
Operating Voltage	11-33 VDC
Operating Temperature	-20°C to +55°C
Frequency Range	118.000 MHz to 136.975 MHz
Channel Spacing	25 kHz
Transmit Power	10 W
Current Consumption	1.5 A (max transmit)