AN/CRN-3

Overview

Ground localization transmitter to provide azimuth guidance of aircraft for blind approach or instrument landing. This set has same components as AN/MRN-1 packed for air transport instead of installed in truck K-53.

Images

1. Transmitter BC-751
2. Modulator & Bridge BC-752
3. Course Detector BC-754 (Portable)
4. Field Intensity Meter BC-755

1. Control Box BC-915
2. Indicator Box BC-777
3. Voltmeter IS-176
4. Case CS-72
5. Radio Set SCR-610

Technical Details

Frequency Range

108.3 - 110.3 mHz

Number of Crystals

3 or 6

Preset Frequencies (mHz)

108.3, 108.7, 109.1, 109.5, 109.9, 110.3

Antenna

5 Alford Loops in same horizontal plane

Tuning

Crystal

Power Supply

Power Unit PE-141 or 110volt 60 Cycles

Power Output

25 Watts

Range

75 Miles

Type of Signal

CW, MCW, Voice

Components

Radio Transmitter Equipment RC-107

Localizer Transmitter Equipment Consists of

• Control Box BC-915
• Radio Transmitter BC-751
• Modulator & Bridge BC-752
• Course Detector BC-753 (Fixed)
• Course Detector BC-754 (Portable)
• Field Intensity Meter BC-755
• Indicator BC-777 Alarm

Antenna Equipment RC-109

Radio Set SCR-610

Heater M-321

Maintenance Parts & Tools

Surveying Instrument

• Crystal Unit DC-8
• Voltmeter IS-175 (Balanced R.F.)
• Voltmeter IS-176 (Unbalanced R.F.))