When properly mounted on the underside of an aircraft, the antennas provide a broad, single-lobed pattern directed downward. The radiation is polarized parallel to the long dimension of the antenna. Electrical elements of the antenna are completely sealed by foamed-in-place resin within a plastic housing. As a result, the N43-1 is rugged enough for use on all subsonic aircraft.
N43 Series Antenna Specifications
| Frequency range | 74.75 – 75.25 MHz |
| VSWR | |
| Less than 5:1 | |
| Less than 2:1 at 75 MHz | |
| Gain | -10 dB |
| Impedance | 50 ohms |
| Polarization | Horizontal |
| Radiation patterns | Hemispherical |
| dc resistance | Grounded |
| Power handling | Receive only |
| Connector | Type BNC female UG-89 |
| Weight | 1.0 lb |
| Finish | White |
| FAA | TSO C35c |
| D0138 ENV. CAT. | JAJ XXX |
| Drag, sea level at 250 MPH | Less than 0.5 lbs |
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