Most HT's have a super charged receiver in them so that they can compensate
for a small and usually poor quality antenna.
Their receivers are likely more sensative then your typical mobile and
therefore will pick up more intermod and noise then the mobiles.  They also
lack adequit filtering due to size limitations in the older rigs.  You would
probably find that a new HT would not get so much noise and would be about
the same as the mobile unit.
This is due to improved filtering at a smaller level and advances in
technology over the years.
73
Colin, V A6BKX
----- Original Message ----- 
From: "pann1" <[log in to unmask]>
To: <[log in to unmask]>
Sent: Thursday, September 28, 2006 5:50 PM
Subject: Re: question


> I'm using a Ventenna on the roof of the apartment complex.  I can squelch
> out the extra noise I receive using my base/mobile rig, but I have noticed
> when I plug in the O2at, the noise is worse.
>
> Terri, Amateur Radio call sign, KF6CA.  Army MARS call sign, AAT9PX
> California
>
> On Thu, 28 Sep 2006, Colin McDonald wrote:
>
> 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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9/22/2006
> >
>