TQ KRT2-S - 6.10 Antenna Installation; 6.10.1 Antenna Selection; 6.10.2 Installation Recommendations

Operation and Installation Manual
KRT2 VHF-Communication Transceiver
Doc.-No: KRT2.A-MAN.en
Rev. 0101
Page 47
From left to right:
Pin 9: GND Mikrofon
Pin 10: PTT-L
Pin 11: PTT-R
Pin 12: Intercom with Bridge to Gnd
Pin 13: RX
Pin 14: Headset
Pin 15: connected with Pin 8 Batterie+
From left to right:
Pin 8: Batterie plus
Pin 7: Speaker +
Pin 6: Mikrofon R
Pin 5: Ext. NF
Pin 4: Speaker minus (not GND)
Pin 3: Mikrofon L
Pin 2: TX Remote
Pin 1: Batterie – GND
Figure 10: KRT2 connection support layout 2
6.10 Antenna
6.10.1 Antenna selection
• A 50 Ohms impedance VHF-COM-antenna is required.
• The antenna must be approved in respect to aircraft type and installation location.
• The antenna specifications can only be fulfilled when properly installed
6.10.2 Installation recommendation
• The manufactures instructions have to be observed.
• The metallic contact between airplane surface and antenna ground must be very good. Non-
metallic airplanes must have installed a metal sheet, foil or mesh of at least 80×80 cm inside the
fuselage as electric counterweight.
• In order to avoid interference the distance between a COM an NAV antenna or between a COM
and another COM antenna should be as large as possible. A distance of 2 metres is normally suf-
ficient.
• The antenna must be installed vertically and as far as possible from parts like propeller, landing-
gear, rudder etc., that may influence propagation of the radio signals.
• In gliders the internal antenna provided by the airplane manufacturer is to be used.
The RF-antenna cable may not be part of other cable sets like power-supply
or microphone.
It must not be placed together with any other COM, NAV or transponder an-
tenna cable.
THIS IS VERY IMPORTANT