View PDF brochure for Tri-Band ELT AntennaDatasheet

Tri-Band ELT Antenna

121.5, 243 and 406 MHz

SKU: 21-50-42

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Tri-Band ELT Antenna

The 21-50-42 is an externally mounted airborne VHF/UHF antenna operating at the three primary distress frequencies.

A fiberglass rod with an internal element is fitted into an aluminum base which contains foamed-in place matching circuits capable of handling up to 25 Watts power.

The method of construction provides protection from world-wide military environmental conditions including vibration, shock and temperature variations.

  • Covers 121.5, 243 and 406 MHz without tuning
  • Very lightweight
  • For helicopter and fixed wing aircraft up to 350 Knots
  • Glass/Epoxy – Aluminum construction
  • Small footprint
  • Meets AS3191 lightning requirements
  • Designed to DO 160 Environmental conditions 
21-50-42
Model # 21-50-42
Brand Cooper Antennas
Frequency 121.5, 243 and 406 MHz 
Gain

+ 2dBi (UHF)

- 5dBi (VHF) 

VSWR

2.0:1 max @ 121.5 and 243 MHz

1.5:1 max @ 406 MHz

Impedance (nominal) 50 Ohms
Power 25 Watts
Polarization Vertical
Radiation Pattern Nominally omni directional in azimuth plane 
Antenna RF Connector BNC Female
Antenna Shell Type Fiberglass whip/ Aluminum base
Height 15.5 inches (394mm) 
Weight 0.45 lb (0.20kg) 
Base Plate Shape Tear drop 
Fixing Holes 4 x Ø 0.170 inches (4.3mm) ±0.005 inches (0.127mm) holes, counter sunk at 100° Ø 0.325 inches (8.1mm). 

Finish

  • Urethane Lusterless Black Standard
  • Other finish options are available.
  • Please specify finish required when ordering.
Datasheet:

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