DM N43-4

The DM N43-1, DM N43-3, and DM N43-4 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-inplace resin within a plastic housing. As a result, the DM N43-1 is rugged enough for use on all subsonic aircraft.

Electrical
Frequency	74.75 - 75.25 MHz
VSWR	Less than 5:1 Less than 2:1 at 75 MHz
Gain	-10 dB
Polarization	Horizontal
Radiation Pattern	Hemispherical
dc Resistance	Grounded
Impedance	50 Ohms
Mechanical
Weight	1.0 lb
Connector	Type BNC Female UG-89
Finish	White
Environmental
FFA	TSO C35c
D0138 ENV. CAT.	JAJ XXX
Drag, Sea Level at 250 mph	Less than 0.5 lbs

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