Gps Antenna - Garmin GTX 3X5 Series Installation Manual

3.4.4 GPS Antenna

A GPS antenna is necessary for the GTX 335 and GTX 345 with the internal GPS option. For information about
antenna selection and part numbers, refer to section 3.8.
GA 35 Antenna
The antenna includes four 8-32 UNC-2A x 1.00" SS 303 mounting screws and one O-ring.
If it is necessary to use an antenna doubler refer to the applicable antenna installation data.
Use four #8 washers and four #8 self-locking nuts to attach the antenna. Applicable nut plates can be attached to the
doubler. Torque the four supplied 8-32 stainless steel screws 12-15 in-lbs. Apply torque equally across all mounting
screws to avoid deformation of the mounting area. Use a TNC plug to connect the GPS antenna coax cable.
GA 36 Antenna
The antenna includes four 10-32 UNF-2A x 1.00" SS 303 mounting screws and one O-ring.
If it is necessary to use an antenna doubler refer to the applicable antenna installation data.
Attach the antenna with four #10 washers and four #10 self-locking nuts. Applicable nut plates can be attached to the
doubler. Torque the four supplied 10-32 stainless steel screws 20-25 in-lbs. Apply torque equally across all mounting
screws to avoid deformation of the mounting area.
Use a TNC plug to connect the GPS antenna coax cable.
GA 37 Antenna
The antenna includes four 10-32 UNF-2A x 1.00" SS 303 mounting screws and one O-ring.
If it is necessary to use an antenna doubler refer to the applicable antenna installation data.
Attach the antenna with four #10 washers and four #10 self-locking nuts. Applicable nut plates can be attached to the
doubler. Torque the four supplied 10-32 stainless steel screws 20-25 in-lbs. Apply torque equally across all mounting
screws to avoid deformation of the mounting area.
Use a TNC plug to connect the GPS antenna coax cable.
A33W Antenna
The antenna includes four 6-32 UNC-2A x 1.00" SS 303 mounting screws and one O-ring.
If it is necessary to use an antenna doubler refer to the applicable antenna installation data.
Attach the antenna with four #6 washers and four self-locking nuts. Applicable nut plates can be attached to the
doubler. Torque the four supplied 6-32 stainless steel screws 3-5 in-lbs. Apply torque equally across all mounting
screws to avoid deformation of the mounting area.
Use a TNC plug to connect the GPS antenna coax cable.
190-01499-02
Rev. 9
Installation Overview
GTX 3X5 Transponder TSO Installation Manual
Page 3-8