Mailing List lml@lancaironline.net Message #23813
From: Gary Edwards <gary21sn@hotmail.com>
Sender: Marvin Kaye <marv@lancaironline.net>
Subject: Re: ACK ELT trips with COM2 transmit
Date: Fri, 14 May 2004 01:27:18 -0400
To: <lml@lancaironline.net>
>>>I know some of you have had the problem of when you transmit on a COM radio your ACK ELT trips on.  I have had this problem with my COM2 since first flight last summer and am now getting to doing something about it....

Well, I have now moved the ELT antenna so it is pretty close to 5' away and it still trips.  I have also rerouted the telephone cable that goes between the remote control panel and the ELT itself, so that it is further away from the COM2 coax and antenna.  Now I get intermittent results with still >50% of COM2 transmissions setting off the ELT!...

Do any of you have words of wisdom in resolving this ELT situation?...
Any help is appreciated....
 
 
My ACK ELT antenna is the one that came with it (metal coiled wire) and is mounted in the center line of the fuselage behind the baggage bulkhead.  It right over the top of the Com antenna coax (RG-58).  The Com antenna is in the vertical stab.  The Com antenna coax is under a copper foil ground plane for the ELT antenna.  My Com radio is a King KX-155.  The ELT cable (telephone type) is within the wire race with other electrical wires as well as the Com coax in the center tunnel/console to the instrument panel.  The ACK ELT is vintage about 1996 to 1998.  
 
The radio has never tripped the ELT.  I have had the ELT trip twice in the first year of operation (1999), once while taxing and once while in the pattern.  Both times were random while not in the transmit mode.
 
Gary Edwards
LNC2 N21SN 

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