Verizon wireless - cell amp question

Author

cell amp question

Jim Everett

2005-12-27, 2:48 am

Ok all you users a simple question.
Who has had experience with a cell amp like the ones by Wilson?
How much improvement did you get>
Thanks
Jim E

Larry

2005-12-27, 5:48 pm

"Jim Everett" <jimeyork@bellsouth.net> wrote in news:zh3sf.62328
$k76.48337@bignews6.bellsouth.net:

> Ok all you users a simple question.
> Who has had experience with a cell amp like the ones by Wilson?
> How much improvement did you get>
> Thanks
> Jim E
>
>
>

http://www.cellantenna.com/Boosters...br /> sters.htm

I've been using the Cellantenna.com DA4000 for several years in my work
van on 800 Mhz CDMA with a 6dB antenna on top of a stepvan. If that
won't link, I have an 11 element DB Products 800 Mhz paging system beam
mounted on a long pool cleaning telescopic handle to use at fixed sites
way out in the boondocks where I sometime have to work.

The price has really come down. It's a very nicely-made piece of
electronics, quite sophisticated, with 800 and 1900 Mhz bi-directional
amplifiers. Phone is a V60i with an external antenna connector, the plug
of which is also available with the amp at cellantenna.com.

The amp works great at overcoming long path fading caused by forests in
the flat country of Eastern SC. That's all it's good for...long path
attenuation. It would be useless in a city where your problem is
multipath, where your signal bounces off objects arriving at the cells at
slightly different times, which trashes digital and makes AMPS analog
fade in and out rapidly as you move just a few inches. In fact, it adds
to the multipath problem because the more powerful signal bounces off
more distant objects arriving at the cell over the noise threshold
creating even more timing problems for digital to fight. If you're
unfamiliar with multipath, you can see it on any UHF TV on the little
loop antenna on the back of a set. Multipath is what causes the awful
ghosting on analog NTSC TV on UHF worse than on VHF. Because the scan is
from left to right on each line, the ghost signal caused by multipath is
always to the right of the main picture signal.

If you must use your toyphone in forested rural areas, it's a good
investment. I can use my toyphone as far out as I used to use the old
AMPS bagphone plugged into the external antenna. If you're in the city
already covered by cellular or PCS, it won't fix your problem unless you
put a beam antenna above the roof and point it at the cell. THAT makes a
difference. For those situations, it might be better staying wireless
with a repeater...
http://www.cellantenna.com/repeater...ng_repeater.htm
In the Verizon store in the mall, look for a square white box hanging out
of the ceiling over the sales floor. I call them "cheater repeaters" to
sell crap toyphones to the uninformed. Hell, any phone works great under
the store's cheater repeaters...(c;

CellGuy

2005-12-28, 5:48 pm

On Tue, 27 Dec 2005 07:49:22 -0500, Larry wrote:

> The amp works great at overcoming long path fading caused by forests in
> the flat country of Eastern SC. That's all it's good for...long path
> attenuation. It would be useless in a city where your problem is
> multipath, where your signal bounces off objects arriving at the cells at
> slightly different times, which trashes digital and makes AMPS analog
> fade in and out rapidly as you move just a few inches. In fact, it adds
> to the multipath problem because the more powerful signal bounces off
> more distant objects arriving at the cell over the noise threshold
> creating even more timing problems for digital to fight.

Larry, have you forgotten that the tower will lower the CDMA phone's TX
output when the signal gets too strong? You won't be blasting out 3 watts
in the city or anywhere near a cell tower.

The only good an amplfier will do with a CDMA phone is, as you stated, on
long path transmissions. Unless you are really off the beaten path it's a
waste of money, IMO.

Larry

2005-12-29, 11:48 pm

CellGuy < cellguy@seemessagebo
dy.com> wrote in
news:1nnc4u0tmbk7d.xbc8r5qnklom$.dlg@40tude.net:

> Larry, have you forgotten that the tower will lower the CDMA phone's
> TX output when the signal gets too strong? You won't be blasting out
> 3 watts in the city or anywhere near a cell tower.
>
> The only good an amplfier will do with a CDMA phone is, as you stated,
> on long path transmissions. Unless you are really off the beaten
> path it's a waste of money, IMO.
>
>

That's what I was trying to tell him. It'll make no difference anywhere
near a cell, other than to increase the noise floor in a hot parking lot.

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