View PDF brochure for Tri-Band ELT AntennaDatasheet

Tri-Band ELT Antenna

121.5, 243 and 406 MHz

SKU: 21-50-41

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Tri-Band ELT Antenna

The 21-50-41 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
21-50-41
Model # 21-50-41
Brand Cooper Antennas
Frequency 121.5, 243 and 406 MHz
Gain (typical)  + 2dBi typical
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

TNC Female for 121.5 and 243 MHz

BNC Female for 406 MHz

Antenna Shell Type Fibreglass whip/ Aluminium 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 Gloss White
  • Other finish options are available.
  • Please specify finish required when ordering.
Datasheet:

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