---------------------------------------------------------- AeroElectric-List Digest Archive --- Total Messages Posted Sun 10/07/12: 2 ---------------------------------------------------------- Today's Message Index: ---------------------- 1. 03:09 AM - OEM or home-made ELT antennas? (Glen Matejcek) 2. 09:45 AM - Re: Fw: OEM or home-made ELT antennas? (Robert L. Nuckolls, III) ________________________________ Message 1 _____________________________________ Time: 03:09:13 AM PST US From: Glen Matejcek Subject: AeroElectric-List: OEM or home-made ELT antennas? Hmmm.... I smell a rat. With all due respect to having to live with the local sherriff, my understanding is that the ONLY thing required to actually be TSO'd on an experimental is a GPS planned for use in termminal operations. Other things needed to be TSO compliant, but that is different from wearing a sticker. Thoughts, Bob? >Time: 04:41:31 PM PST US >Subject: Re: AeroElectric-List: Fw: OEM or home-made ELT antennas? >From: Richard Girard > >Mike, I had this conversation with the local FSDO about two months ago. The >antenna is part of the TSO for the ELT. Even on an experimental it's not >legal to put on anything but the manufacturers antenna. Sorry to be the >bearer of bad news. > >Rick Girard > >On Sat, Oct 6, 2012 at 1:51 PM, Mike Wynn wrote: > >> ** >> Hello Bob, et al: >> I found and purchased a NOS "ACK ELT", w/o a fixed [fuselage] antenna. I >> plan to install in the Lancair [composite beast]. >> Your opinion please on whether to go dirt cheap and build an antenna to >> install, or buy the OEM [ACK] version? >> Ques. #2: Is it always best to use the ELT's manufacturers antenna design, >> rather than someone elses, that looks comparable/compatible? I have a >> Garrett ELT antenna & base {p/n 615363-1} with a couple of tuner-coils (?) >> imbeded in epoxy in the base.... Haven't found any info on the net. >> Thanks in advance, >> Mike W. >> Moab, UT Glen Matejcek ________________________________ Message 2 _____________________________________ Time: 09:45:39 AM PST US From: "Robert L. Nuckolls, III" Subject: Re: AeroElectric-List: Fw: OEM or home-made ELT antennas? At 01:51 PM 10/6/2012, you wrote: >Hello Bob, et al: >I found and purchased a NOS "ACK ELT", w/o a fixed [fuselage] >antenna. I plan to install in the Lancair [composite beast]. >Your opinion please on whether to go dirt cheap and build an antenna >to install, or buy the OEM [ACK] version? >Ques. #2: Is it always best to use the ELT's manufacturers antenna >design, rather than someone elses, that looks >comparable/compatible? I have a Garrett ELT antenna & base {p/n >615363-1} with a couple of tuner-coils (?) imbeded in epoxy in the >base.... Haven't found any info on the net. >Thanks in advance, >Mike W. >Moab, UT From a purely technical perspective: If this were a legacy 121.5 "hope it will work" type ELT, then any VHF comm antenna would perform as well as the 'stock 'antenna supplied with the ELT. The modern two-frequency ELTs require either two separate antennas (like those on the Beechjet) Emacs! Or a muti-band antenna tailored to the task. It's likely that ANY 121.5/406 antenna would work just fine but given the relative level of understanding by any individual likely to take regulatory notice, likelihood of getting a substitution approved is very low. They are skilled in the reading of labels and checking of boxes on forms, not skilled judging the suitability of any substitution to a task. From the regulatory perspective: Irrespective of the technical validity of any substitute you might find, the risk for having it become some kind of . . . uh . . . bump in the road is not zero. The term TSO appears 52 times in the latest version of Part 91 just downloaded. It speaks to all manner of panel mounted electro-whizzies including ELTs. TSO's are becoming a kind of executive order that exerts a force "for our own good." Resistance is futile, we will be assimilated. Bob . . . ------------------------------------------------------------------------------------- Other Matronics Email List Services ------------------------------------------------------------------------------------- Post A New Message aeroelectric-list@matronics.com UN/SUBSCRIBE http://www.matronics.com/subscription List FAQ http://www.matronics.com/FAQ/AeroElectric-List.htm Web Forum Interface To Lists http://forums.matronics.com Matronics List Wiki http://wiki.matronics.com Full Archive Search Engine http://www.matronics.com/search 7-Day List Browse http://www.matronics.com/browse/aeroelectric-list Browse Digests http://www.matronics.com/digest/aeroelectric-list Browse Other Lists http://www.matronics.com/browse Live Online Chat! http://www.matronics.com/chat Archive Downloading http://www.matronics.com/archives Photo Share http://www.matronics.com/photoshare Other Email Lists http://www.matronics.com/emaillists Contributions http://www.matronics.com/contribution ------------------------------------------------------------------------------------- These Email List Services are sponsored solely by Matronics and through the generous Contributions of its members.