If you are refering to intermod noise, like pagers, or intermod from near by
repeater sights, then yes, there are filters availible to get rid of that
noise.
However, if you use one of these filters, you might as well not be using an
outdoor antenna since they reduce the gain of the antenna so much.
You shouldn't be getting horrible amount of intermod anyway, some yes, but
nothing that can't be tollerated.
Also, if your local repeaters have ctcss tones, put them in and that will
totally eliminate intermod.
Beyond intermod, outdoor antennas do not cause higher noise levels at
all...not on FM anyway.
73
Colin, V A6BKX

----- Original Message ----- 
From: "pann1" <[log in to unmask]>
To: <[log in to unmask]>
Sent: Thursday, September 28, 2006 3:02 PM
Subject: Re: question


> Is it possible to filter out the extra external noise you pick up when you
> use an outside antenna with an ht?
>
> Terri, Amateur Radio call sign, KF6CA.  Army MARS call sign, AAT9PX
> California
>
> On Mon, 25 Sep 2006, Russell Schermer wrote:
>
> Whether an ht can hit the repeater depends on how high the repeater is and
what's between you and the repeater.  If you plan on using the ht as a base
as
> well as portable its a good idea to have an outside antenna to get the
signal out.On Mon, 25 Sep 2006 15:40:55 -0500, Holly Alonzo wrote:
>
> >The closest repeater to here is about 25 minutes away.  Does anyone know
> >if an ht will go that far?
> >
> >Thanks,
> >
> >Holly
>
>
> >--
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