Radio Navigation Equipment - Signalspaning.se

7-7PII
Radio Receiving Equipment AN/ARN-5 is an airborne
radio receiving equipment used in conjunction with
the glide path transmitter of the AAF Instrument Approach
System to provide a visual indication of the glide path course
to be followed by the pilot of the aircraft during instrument
landing operation.
Output of the receiver is fed into a cross-pointer
indicator, and the position of the meter's horizontal pointer
with respect to the center of the face gives the pilot an
indication of whether to fly up or down to remain on a predetermined
descent path to ground.
The receiving equipment operates on one of three
frequencies 332.6 mc, 333.8 mc, or 335 mc. In the event
of receiver failure, or the absence of a signal from the
glide path system for any reason, a "fly up" indication is
obtained.
Antenna System AS-27/ARN-5 is used with the
dual installation of the glide path and localizer receivers.
Antenna System AS-61-( )/ARN-5 is used when the glide
path receiver is installed without the localizer receiver.
Power input of the receiver is 1.35 amperes at
28 volts d.c.. Reception of a 90 and 150 cycle modulated
signal from the glide path transmitter over a range of 15
miles is possible.
-~z
Antenna System AS-27A/ARN-5
Antenna Assembly AS-61/ARN-5
RADIO RECEIVING EQUIPMENT AN/ARN-5
Component Nomenclature
Radio Receiver
or Radio Receiver
Mounting
Antenna Assembly
or Antenna System
R-89/ARN-5
R-57/ARN-5
MT-28/ARN- 5
AS-61/ARN-5
AS-27/ARN-5
~ ~ -"""~-
and includes plugs, adapters, resistor, capacitor and rf cable.
Nay 1945
SAN/ARN-5
Test equipment required for maintenance includes
TS-170/ARN-5 and TS-67/ARN-5.
Army Supply Program requirements as of 1 February
1945 were 33,718 equipments for the calendar year
1945 and 19,630 for 1946.
POWER INPUT 37 WATTS @ 28 VOLTS
DC,
FREQUENCY 332.6 333.8 MC. 335 M
TYPE OF SIGNAL CW
RANGE 15 MILES
SENSITIVITY AVERAGE 50 MICRO-
VOLTS
SELECTIVITY 6DB DOWN AT 400 KC
OFF RESONANCE
60 DB DOWN AT 2000
KC OFF RESONANCE
TUBE COMPLEMENT
NO. TYPE NO. TYPE
7 6AK5 1 125R7
2 12SN7GT 1 28D7
Radio Receiver R-89/ARN-5A
Size
6" x 12" x 7"
6" x 12" x 7"
6"x12" x3'
Width 15 inches
10" x 20" x 15"
TOTAL WEIGHT 2 0 LBS.
Weight
11 Lbs.
11 Lbs.
3 Lbs.
8 Lbs.
2 Lbs.