BendixKing KHF 990 - Manual (Page 35)

KHF 990 REMOTE UNITS
KAC 992 PROBE/ANTENNA COUPLER
The KAC 992 Probe/Antenna Coupler (Figure 2-9) is a combined
Whip Antenna and Coupler designed to automatically match the
impedance of the antenna to 50 ohms over the full frequency range
of 2.0 to 29.999 MHz. The KAC 992 Coupler is hermetically sealed,
so may be mounted either totally external or with coupler section
mounted internally and the antenna protruding through a clearance
hole in the aircraft skin.
Description
2-10 KHF 950/990 Pilots Guide
Rev. 0
Dec/96
Figure 2-9 KAC 992 Probe/Antenna Coupler