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Old 07-01-2018, 02:45 PM
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Default Included ELT antenna for COM

Is the included ELT antenna usable as a COM cable between the radio and antenna?
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Old 07-01-2018, 06:01 PM
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The antenna that comes with the ACK E-04 is the E-04.8 which is designed for transmitting on 121.5 MHz and 406 MHz.

The ACK-E-04 is spec'd to output a maximum of 23 dBm at 121.5 MHz. That's 200 mW and is 50 times less than the typical 10 W aviation communications transceiver. So the E-04.8 may not be designed to accommodate the output power of a comm radio.

I can't find any document showing the frequency response of the E-04.8. If it has a tight bandwidth (which I doubt but do not know) on VHF, the SWR might swing high in the comm freqs.

There is no harm in using the antenna for receive only with a communications transceiver.

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Last edited by RV-14E : 07-01-2018 at 06:04 PM.
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