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HMMWV M998 SINCGARS MILITARY RADIO NVIS TILT WHIP ANTENNA BASE For Sale
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HMMWV M998 SINCGARS MILITARY RADIO NVIS TILT WHIP ANTENNA BASE:
$369.95
Shakespeare Model 4287-A NVISHF TILT WHIP old stock.Comes with aftermarket base plate adapter.5/8" threads on connector
Model 4287-A Shakespeare Tilt WhipAdapter with Coaxial Feed PointShakespeare Part Number4287-1A,4287A,4289AMarine Corps Part ApplicationsAAV-C7,LAV-25,LAV-C2
• Antenna spring base with tilt whip adapter built in• Use with 16’ or 32’ antenna, 16’ MFG recommended• Forward or reverse tilt• 12° offset built into base• Spring loaded locking pin allows quick change of tilt settings at vertical, 50º, 70º, 90º• UHF Bulkhead connector• Rated 1 KW
2-30 MHz NVIS TILT WHIP ADAPTERSThe purpose of NVIS (Near Vertical Incident Signal) is to enable communications in the area commonly called the “SkipZone or “Dead Area.” This is accomplished by tilting the antenna so that its main radiating lobe is 73° to 83° above thehorizon. The higher radiating lobe causes the signal to bounce off the ionosphere, returning to the earth in the dead areathat may occur 10 to 150 miles out when using the antenna vertically.The HF band is home to the most effective frequencies for NVIS applications: 4 to 12 MHz. Shakespeare’s Model 120system is NVIS ready. The antennas can be mounted on a base, such as Model 4287A Spring Base, which has tiltfeatures built in along with a 12° tilt offset. This product is primarily used with the United States Marine Corps LightArmored Vehicle (LAV) 25.RF-1980F-AT001/RF-1980-AT001 HF TILT WHIP ADAPTER
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