TB 43-0123
AT-640AIARN
EIC: NIA
AT-640A/ARN Antenna1. Brief Description: The
2. Applicable Tools and Test Equipment:
Not applicable.
AT-640A/ARN (Collin 37X-2) is a horizontally-
polarized antenna designed for receiving 75 MHz
marker beacon signals. The antenna' standing wave
3. Applicable Publications:
ratio is 3 to 1 or less. It has an input impedance of
Not applicable.
52 ohms.
II-B-37
