ebc 406afhm

Last updated April 17, 2023. Please call for pricing – 718-401-0288, Option 2

Military/helicopter version of the EBC406AFH. For aft mounting, is painted flat black, transmits on three frequencies. Uses an external rod antenna. Meets TSO-C126 and TSO-C91a.

Product Manual

The EBC 406AFHM is an aft or tail mounted ELT for rotary wing military or governmental aircraft in which night vision equipment is used but where an external rod antenna is needed. These ELTs are painted a non-reflective flat black to be night vision compatible. The EBC 406AFHM has an external rod antenna and so it can be installed in the aft section of the aircraft provided that the pilot can reach it in case of an emergency. To meet the needs of our military or governmental users these ELTs transmit on three frequencies: 406.028, 121.5 and 243.0MHz.

The system comes with a transmitter, survival tape antenna, mounting bracket, a battery pack and an external rod antenna with a 6 ft. cable and a Remote Control Monitor with a connector kit. If the ELT is activated a built-in monitor emits a loud beeping tone and the LED flashes. The survival antenna allows the ELT to transmit a good signal when used outside the aircraft.

Intended for military or civilian governmental use it has been designed with the newest technology. The EBC 406AFHM incorporates the best and proven features that characterize all of EBC’s emergency locator transmitters. These transmitters have encapsulated electronics and battery packs to provide added protection against shock, moisture and other environmental hazards.

A self-test feature is built into the EBC 406AFHM. This feature allows the pilot to test for output power on both 406.028 and 121.5 MHz, the connection with the antenna, and the condition of the digital signal. The test can be done directly at the ELT or through the Remote Control Monitor.

The EBC 406AFHM meets the requirements of TSO-C91a and TSO-C126, approved by COSPAS-SARSAT and meets FCC requirements under Part 87.


  • Size (ELT): 2.9″ W x 2.5″ D x 6.7″ H
  • Total Weight: 2.5 lbs. (including battery, but not antennas, cable or remote control monitor)
  • Case Material: Aluminum
  • Finish: Black Baked Enamel
  • Antennas: External – Three frequency rod standard
  • Survival/Portable – Three frequency tape


  • Encapsulated for waterproofness and shock resistance
  • Handhold lanyard
  • Mounting bracket with latch to hold the ELT securely in place
  • Self-test feature with audible and visual indication of pass or fail
  • Fire resistant
  • Easy installation in cabin
  • Recessed 3-position toggle switch
  • 2 year parts and labor warranty
  • True 360˚ spherical G-switch


Operating Frequencies: 406.028 MHz, 243.0 MHz and 121.5 MHz
Modulation 406.028 MHz:- Biphase L (16KOG1D)
Modulation 121.500 MHz: Swept tone 1600 Hz to 300 Hz, 2-4 times/second
Output Power on 406.028 MHz: 5W for 24 hours at -20˚C
Output Power on 121.500 MHz: 50 mW min for 50 hours at -20˚C
Operating Temperature: -20˚C to +55˚C
Battery Type: Lithium Manganese Dioxide (GS-46 Battery Pack)
Useful Battery Life: 5 years or 1 hour of cumulative use
Automatic Activation: Velocity change of 3.5 ft/sec activates ELT
Altitude: 50,000 ft
Decompression: 8000 ft to 50,000 ft
Over Pressure: -15,000 ft
Humidity: 95% for 144 hours
Shock Performance: 500 Gs on 6 Axis for 4ms
100 Gs on 6 Axis for 100ms
Vibration: Withstands 10 Gs
Immersion: Withstands 24 hours in salt water
Message Protocols: Aviation User Protocol, Serialized Aviation User Protocol
Activation Alerts: LED and buzzer
Input Power: No Aircraft Power Required


*Disclaimer: Distress signals on 121.5 or 243.0 Mhz are legal but in 2009 processing of the signals by Search and Rescue personnel was discontinued.