Just to set the record straight, from the 744 MM:
VOR/LOC Antenna
A.
One dual-channel VOR/LOC antenna is used to provide rf signals to the ILS when the airplane is in the air prior to approach, and to the VOR system(SUBJECT 34-51-00).
B.
The VOR/LOC antenna is located on the vertical stabilizer tip. The left channel of the VOR/LOC antenna provides signals to the left ILS via the left VOR/LOC rf power divider. The right channel provides signals to the right and center ILS via the right VOR/LOC rf power divider and the right/center LOC rf power divider.
4.
Localizer Antenna
A.
Two dual-channel LOC antennas are used to provide localizer information to the receivers when the airplane is in approach mode.
B.
The LOC antennas are located on the forward pressure bulkhead inside the nose radome. One LOC antenna is located above and one below the weather radar antenna. The lower LOC antenna provides signals to the left and right ILS receivers. The upper LOC antenna provides signals to the center receiver. One channel of the upper antenna is not used.
5.
Glide Slope Capture Antenna
A.
Two dual-channel G/S capture antennas are used to provide glide slope information to the receivers before the nose landing gear is down and locked.
B.
The G/S capture antennas are located on the forward pressure bulkhead inside the nose radome below the weather radar antenna. The lower G/S capture antenna provides signals to the left and right ILS receivers.
The upper G/S capture antenna provides signals to the center receiver.
One channel of the upper antenna is not used.