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DMN43-4 Navigation Antenna
Frequency 74.75-75.25 MHz
(DAI Part# DMN43-4)
The DMN43-1, DMN43-3, and DMN43-4 are low silhouette antennas for use with 75 MHz marker beacon receivers. 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 DMN43-1 is rugged enough for use on all subsonic aircraft.

SPECIFICATIONS
Electrical
Frequency 74.75 to 75.25 MHz
VSWR < 5:1
< 2:1 @ 75 MHz
Gain -10 dB
Impedance 50 OHMS
Polarization Horizontal
Radiation Pattern Hemispherical
DC Resistance Grounded
Mechanical
Connector BNC (female UG-89)
Weight 1.0 lbs.
Finish White
Environmental
FAA TSO C35c
D0138 ENV CAT. JAJ XXX
Drag, Sea Level @ 250 MPH < 0.5 lbs.
Harris (D&M/EDO)
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