Today's Message Index:
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1. 03:44 PM - elt antenna (bobnoffs)
2. 05:11 PM - Re: elt antenna (Stuart Hutchison)
Message 1
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in the process of mounting the antenna for an aretex 345 elt. i am wondering if
anyone has any experience mounting this antenna base 4-5' below the longeron
and window. i am asking if that bottom 5' of antenna behind an alum. skin will
impair signal. the bottom 8 or 9' of the antenna is encased in hard rubber.
i asked a factory rep about this but it was a pretty ambigious answer. i suppose
it is a pretty unpredictable set of circumstances. anyone that can speak
from experience or knowledge please let me know.
bob noffs
p.s. o.v.m. is almost in.
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=482430#482430
Message 2
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Gday Bob.
I working a similar problem.
My part number is ELT10-773 for a Kannad Compact if you want to look up a pic.
I believe these ELT whip antennas are base-loaded, meaning the Acetal plastic
base is also generating signal and should not be shielded by a metal fuselage.
I dont want all that thick antenna base hanging out in the breeze. For this reason
I have installed mine in the dorsal fin, but with the empennage fitted I
cant reach into the fuselage from the back to uncouple the coax BNC, so I need
to make a doubler in the skin to unscrew the mount from above. This requires
taking the dorsal fin off, which puts some pressure on the antenna base and causes
some flex in the skin (cos it wraps around the leading edge of the horizontal
stab). I would like to make a flex joint to stop the skin movement, but
I suspect this antenna requires proper grounding to a ground plane just like
a COM antenna.
Kind regards, Stu
> On 16 Aug 2018, at 08:43, bobnoffs <icubob@gmail.com> wrote:
>
>
> in the process of mounting the antenna for an aretex 345 elt. i am wondering
if anyone has any experience mounting this antenna base 4-5' below the longeron
and window. i am asking if that bottom 5' of antenna behind an alum. skin will
impair signal. the bottom 8 or 9' of the antenna is encased in hard rubber.
> i asked a factory rep about this but it was a pretty ambigious answer. i suppose
it is a pretty unpredictable set of circumstances. anyone that can speak
from experience or knowledge please let me know.
> bob noffs
>
> p.s. o.v.m. is almost in.
>
>
>
>
> Read this topic online here:
>
> http://forums.matronics.com/viewtopic.php?p=482430#482430
>
>
>
>
>
>
>
>
>
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