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Borrow a VSWR meter and check the antenna you have.
One used by ham radio operators for 2 meters will do just fine. If the SWR is
not much worse than about 2:1 at the highest frequency, then leave it alone and
use it.
As far as antenna orientation goes, cross
polarization loss (horizontal to vertical) is only 3db.
Wolfgang
----- Original Message -----
Sent: Thursday, January 05, 2012 1:58
PM
Subject: Re: [LML] Nav/Com antennas
Thanks Jack.
Now I just wish I would
have bonded the 2nd antenna in the wingtip at the factory. Somehow I have to
open up the tip and slide one in. I guess it is fiberglass, you can do
anything with it.
Matt
From: Jack Morgan <jmorgan1023@comcast.net>
To: lml@lancaironline.net
Sent: Wednesday, January 4, 2012 1:38
PM
Subject: [LML] Nav/Com
antennas
Hi Matt:
I just used the Nav antenna with no modification. Theoretically you
should shorten it to be optimum for the slightly higher Com frequency range
but the gain realized is not worth the effort. By leaving it alone you have
the option to use it as a Nav antenna in a later configuration where maximum
sensitivity is more important. To really optimize the antenna for Com you
would need to slightly change the tap point as well as the coupling
capacitance associated with the tap. In real practice the noise level of the
audio at the fringes of reception are not significantly different between the
Com1 and Nav antennas to warrant retuning the Nav antenna.
Jack
Hi Jack,
I am wanting to install an antenna in the left wingtip on my
Legacy for Com2. I am wondering if you could recommend one. It looks like I
will need to get one of the Bob Archer VOR antenna's. It doesn't look like
there is an actual Bob Archer Com antenna that will fit. What did you use
specifically in your wingtip? I remember reading some time back that a com
and vor antenna are very close in size so I am guessing I could use them
interchangeably. Not sure.
If anyone else has any experience with this I would also
appreciate their input.
Matt
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