AN~ARN-7

Overview

Airborne automatic direction-finder. Gives automatic bearing indication of the direction of arrival of radio frequency energy. Also aural reception of CW, MCW or Voice on loop or antenna.

Images

Technical Specification

Frequency Range

100kHz - 1.75 mHz

Antenna

Loop and sense antenna LP-21

Tuning

Remote manual

Sensitivity

40 mv./Meter

Selectivity

10 times resonant input for 6.3 kHz bandwidth

Power Source

100v 400 Cycles AC

Range

Accurate bearings to about 100 miles daytime. Subject to night effect errors.

Tubes

• 2 - VT-166
• 1 - VT-74
• 4 - VT-86
• 1 - VT-87
• 2 - VT-93
• 1 - VT-94
• 1 - VT-96
• 1 - VT-105
• 2 - VT-109

Components

• 1 - Radio Compass Unit R-5~ARN
• 2 - Radio Control Box
• 1 - Indicator I-81
• 1 - Indicator I-82
• 1 - Relay BK-22
• CD-365

References

• AN 08-30ARN7-2

AN 08-30ARN7-2 25 May 1945