Max Signal

A good dual band amplifier can make an unsable signal useable . That is
the point . Lots of good products and dealers out there.

AZ Nomad;1197733 Wrote:
> On Sat, 18 Aug 2007 18:00:57 -1000, BruceR <razrbruce@NOgmailSPAM.com>
> wrote:
>
>
>
>
> > AZ Nomad wrote:
> >> On Sat, 18 Aug 2007 14:48:35 -0600, Todd Allcock
> >> <elecconnec@AmericaOnLine.com> wrote:
> >>
> >>
> >>> At 18 Aug 2007 20:22:47 +0000 AZ Nomad wrote:
> >>
> >>>> Yeah, you're lying. A thousand times zero is still zero.
> >>
> >>
> >>> But who says the signal is actually "zero." Just because it's
> below
> >>> a level the phone's signal strength meter registers as usable
> doesn't
> >>> necessarily mean there isn't a signal for the amp to latch on to.
> >>
> >> amplifiers don't latch on to signals.
>
> >A sensitive antenna setup can receive an otherwise unuseable signal
> and
> >amplify it to useable strength.
>
> If the signal is unuseable, the amplified signal will be no better.
> You'll
> amplifify noise as well and the signal will in fact be less useable.


--
Max Signal
------------------------------------------------------------------------
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View this thread: http://cellphoneforums.net/alt-cellu...e-booster.html

Andreas Wenzel

AZ Nomad schrieb:
> On Sat, 18 Aug 2007 18:00:57 -1000, BruceR <razrbruce@NOgmailSPAM.com> wrote:
> [...]
>> A sensitive antenna setup can receive an otherwise unuseable signal and
>> amplify it to useable strength.
>
> If the signal is unuseable, the amplified signal will be no better. You'll
> amplifify noise as well and the signal will in fact be less useable.

A directional antenna does not amplify the signal and therefore does not
amplify any noise. In transmit case, it concentrates the radiated RF
energy into a certain direction, creating a stronger field in that
direction than a non directional antenna would (at the cost of creating
a weaker field in all other directions). In the receive case, it is not
as easy to understand, but the effect is the same. Signals coming from
the direction the antenna points to are received stronger while noise
from all other directions is suppressed.

Andreas

Wayne C. Morris

In article <slrnfcn7jk.74u.aznomad.2@ip70-176-155-130.ph.ph.cox.net>,
AZ Nomad <aznomad.2@PremoveOBthisOX.COM> wrote:

> On Sat, 18 Aug 2007 18:00:57 -1000, BruceR <razrbruce@NOgmailSPAM.com> wrote:
>
> >A sensitive antenna setup can receive an otherwise unuseable signal and
> >amplify it to useable strength.
>
> If the signal is unuseable, the amplified signal will be no better. You'll
> amplifify noise as well and the signal will in fact be less useable.

If you believe that, you clearly don't have the slightest idea how radio
works.

I took electronics class in high school; I built crystal radios, tube
radios, and transistor radios. The tubes or transistors served to
amplify a weak signal from an unuseable level to a useable level, and
allowed a smaller antenna to be used. Back then, manufacturers
advertised how many transistors were in their transistor radios because
as a general rule, more transistors meant more amplification and
therefore better ability to pull in weak signals from faraway stations.

Cell phones may use different frequencies and modulation techniques than
those old AM radios, and they send as well as receive, but the basic
principles are unchanged: If you add a more powerful amplifier and/or a
bigger antenna, you can pick up weaker signals and send signals farther.

Yes, the noise is amplified too, but that's only a problem when the
signal to noise ratio is low. As long as the s/n ratio is above a
certain threshold, a cell phone will have no difficulty filtering out
the amplified noise from the amplified signal.

Twister Group

On Sun, 12 Aug 2007 10:33:20 -0500, <ThrowAwayAddress@isd.net> <ThrowAwayAddress@isd.net> wrote:
>When we go to the (recently-aquired) cabin we are just on the edge of cell
>phone service.
>We can get a signal less than a mile from the cabin, in terrain that is
>heavily forested and has variances of elevation of no more than 50 feet
>vertical
>We really don't want to have permanent (line) phone service in the cabin,
>but it would be nice to have cell phone service just in case

>Someone suggested we get a cell phone booster for the car and/or cabin

>Any advice and experience with such a device would be appreciated

>Oh yes, primary service is T-Mobile
>But Cingular is the provider in and around the cabin
>The phones are Motorola Razor V3s
>We also have some Motorola V300s that could be left at the cabin for 911 if
>a booster is a solution

dold@63.usenet.us.com

In alt.cellular.motorola Twister Group <sales@thetwistergroup.com> wrote:
> >We also have some Motorola V300s that could be left at the cabin for 911 if
> >a booster is a solution

http://www.spotwave.com/residential/products/z1900.asp
Try one of these and let me know how it works ;-)

--
Clarence A Dold - Hidden Valley Lake, CA, USA GPS: 38.8,-122.5