johncuyle Posted April 25, 2018 Report Share Posted April 25, 2018 I'm looking at adding a 406 ELT when I do my ADS-B upgrade. I guess I have a few questions: Has anyone done a 406 ELT upgrade? Which one did you get and are you happy with it? For K model owners with a panel switch for a 121.5 ELT, were you able to use the existing switch and wiring? What sort of external antenna did you end up with? Right now my plane has a couple of dorsal fin antennas, neither of which look like the rod or whip ELT antennas I'm familiar with. Are those just fairings and there's a standard whip antenna inside one? Quote Link to comment Share on other sites More sharing options...
jetdriven Posted April 25, 2018 Report Share Posted April 25, 2018 The new 406 ELT’s are certified as a system and the Antenna is part of that system. But a lot of the antennas bases have a long thick rigid nonflexible part which will not fit under The dorsal. But a certain RAMI flexible 406 antenna is legal to retrofit and you can put that under the Dorsal fin. This is what I did. Quote Link to comment Share on other sites More sharing options...
johncuyle Posted April 26, 2018 Author Report Share Posted April 26, 2018 40 minutes ago, jetdriven said: The new 406 ELT’s are certified as a system and the Antenna is part of that system. But a lot of the antennas bases have a long thick rigid nonflexible part which will not fit under The dorsal. But a certain RAMI flexible 406 antenna is legal to retrofit and you can put that under the Dorsal fin. This is what I did. Which ELT did you go with? My installer has done a bunch of ACK E-04's, which have an angled whip that looks like it could probably fit. I have an email out to them asking whether they know if it will and if installing it that way is permissible, but I'm open to other options. Thanks! Quote Link to comment Share on other sites More sharing options...
jetdriven Posted April 26, 2018 Report Share Posted April 26, 2018 (edited) The rami Av-100 is a tso 406 Elt antenna. You can retrofit that. It certainly fits underneath the dorsal fin. Contact me if you need precise measurements Edited April 26, 2018 by jetdriven Quote Link to comment Share on other sites More sharing options...
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