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ACK Whip Antenna For E-04

$113.75/Each
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Part# 11-10465
MFR Model# E-04.8

Overview

E-04 406 ELT whip antenna.
   
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Reviews

Same antenna as came with my original ELT package purchase. An easy installation.

James M Verified Purchase

ACK E-04 Whip Antenna

February 27, 2022

Nice product!

William R Verified Purchase

ACK E-04 Whip Antenna

December 11, 2021

The part received from Aircraft Spruce was as expected and required and without faults

Helicentro S Verified Purchase

ACK E-04 Whip Antenna

June 24, 2021

a perfect replacement for the original antenna

John H Verified Purchase

ACK E-04 Whip Antenna

May 25, 2021

This was a replacement for the original that the plastic totally fractured. I live in the northwest, plane always hangared, not left in the sun very often. I think the plastic base was of a poor quality. I also had a failure on my revious ACK ELT. I would buy a different brand next time.

Robert W Verified Purchase

ACK E-04 Whip Antenna

August 6, 2024

Q&A

Please note, Aircraft Spruce's personnel are not certified aircraft mechanics and can only provide general support and ideas, which should not be relied upon or implemented in lieu of consulting an A&P or other qualified technician. Aircraft Spruce assumes no responsibility or liability for any issue or problem which may arise from any repair, modification or other work done from this knowledge base. Any product eligibility information provided here is based on general application guides and we recommend always referring to your specific aircraft parts manual, the parts manufacturer or consulting with a qualified mechanic.

Q: Can this antenna be mounted underside on the belly of an aircraft with metal airframe?

The install manual states that the antenna is to be mounted on top of the aircraft +-35 degrees of vertical when the aircraft is in normal flight attitude.

Q: What is the length of this antenna and what size ground plane would it require?

The supplemental ground plane must have a minimum diameter of 24" however 48 will provide maximum power at 121.5 MHz and is highly recommended. This antenna is 20.625" long.

Q: I have an AK-451 that Im looking at replacing with the ACK-04. Can I reuse the external antenna from the AK unit or would it need to be replaced with the ACK whip antenna?

To comply with the TSO installation instructions the external antenna will require replacement as well.

Q: What is the overall length of the ACK whip antenna?

Approx 21.5 inches

Q: Does this take standard BNC connector? Is the nut securing the antenna to the fuselage pretty much standard/typical?

Yes it uses a standard bnc connector and the nut is standard/typical.

Q: When the antenna is attached a flat ground plane what is the distance from the tip of the antenna to the ground plane?

Approx 20.5 inches.

Q: Will this ACK Whip antenna function with the older 121 frequency ELTS?

Yes, as the new ELTs transmit both 121.5 and 406. however typically ELT antennas should be for the brand ELT that is installed. It is not recommended to use an ACK E-04 antenna for another brand ELT.

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