ebc 406afh

Quality compatibility are guaranteed with EBC’s accessories and replacement components.

Same as EBC 406AF, (aft mount) with 720 degree spherical automatic activation for helicopter use. Transmits on 406.028 & 121.5 MHz. Meets TSO-C91a and TSO-C126.



Product Manual

The EBC 406AFH is designed for installation in the aft or tail section of a
helicopter. It transmits on the frequencies of 406.028 and 121.5 MHz.
The system comes with a transmitter, portable/survival antenna, mounting
bracket, external whip antenna with a 6 foot coax cable, a battery pack
and a Remote Control Monitor with its connector kit. The whip antenna
can be replaced with a rod or blade antenna if desired. If the ELT is activated
a built-in monitor emits a loud beeping tone and the LED on the Remote
Control Monitor flashes. The portable/survival antenna allows the ELT to
transmit a good signal when used outside the aircraft.

Designed with the newest technology, the EBC 406AFH also 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.

The EBC 406AFH uses our proven omnidirectional activation system. This
system uses 2 omnidirectional switches mounted perpendicularly to each
other. Since each senses impact in 360˚ the total coverage is a true 360˚
multiaxis activation switch. The switches are connected to a timing
circuit so that only a crash, not a hard landing or vibration, will activate
the unit. False alarms are therefore eliminated.

A self-test feature is built into the EBC 406AFH. 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 is done
directly at the ELT or through the Remote Control Monitor.

The EBC 406AFH 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: Yellow Baked Enamel


  • 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
  • Recessed 3-position toggle switch
  • 2 year parts and labor warranty
  • True 360˚ spherical G-switch


Operating Frequencies: 406.028 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.