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Improving reception/dropouts in car?



 
 
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  #1  
Old May 14th 07, 02:59 AM posted to alt.cellular.verizon
[email protected]
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Posts: 31
Default Improving reception/dropouts in car?

Can any of you recommend an external antenna that is actually
effective in reducing dropouts and improving reception while driving?

  #2  
Old May 14th 07, 04:59 AM posted to alt.cellular.verizon
Larry
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Posts: 9,696
Default Improving reception/dropouts in car?

wrote in news:1179107978.867816.142970
@q75g2000hsh.googlegroups.com:

Can any of you recommend an external antenna that is actually
effective in reducing dropouts and improving reception while driving?



Any of the high gain magnetic-mounted antennas for your specific band
will extend your range, within reason. The old AMPS antennas work great
if your system is on the original 800 Mhz "cellular" band. If your
system uses PCS, as many of Verizon's systems do, especially here in the
South, you'll want a different antenna made for that band, or a dual band
antenna that will cover them all, the higher the gain the better.

I've been using the CA40M from
http://www.cellantenna.com/Antennas/magneticmount.htm
for years. This very-high-gain 40" long dual band colinear for 800/1900
Mhz is a great mobile antenna....unless you park in a low parking garage
that will always knock it over. It IS, in fact, 40" long which makes
garaging it much trouble. It should, as with any UHF antenna, be mounted
on top of the roof, not the trunk, for maximum range. Altitude on UHF is
our friend, precisely why the UHF TV station has a 2000' tower or
mountaintop transmitter. One of the lesser antennas on this page, like a
CA12M (12" tall), is also very acceptable.

I think the gain figures on all cellular mobile antennas is quite
inflated, sort of like the power output figures on your home stereo, but
they do make a huge difference over that crappy stub leaning up against
your ear, just by being in a more unobstructed place outside the car's
natural metal shielding.

Since they took my 3 watt bagphone away from me to plug into the big
antennas, I've had the DA4000 3W (800 Mhz)/2W (1900 Mhz), bi-directional
power amplifier/preamp from these people:
http://www.cellantenna.com/Boosters/...l_boosters.htm
When you are at maximum range, even CDMA will crank up your power output
to full power. With these power amps, the difference is what "full
power" level really is...3 Watts instead of the measily 150 milliwatts of
todays little toyphones. That DOES make a difference, especially out in
dense foliage or other RF energy absorbing conditions and solar noise,
which raises the noise floor to the cellular system receivers all day in
the hot sun. The amp simply makes you louder than the noise from the hot
parking lots/buildings the cell's receiver is listening to. (Out in the
fringe, the amp also makes your signal level with the other CDMA users on
the current channel further away from that last cell before the DEAD
ZONE. The longer the system can keep your signal leveled with the other
users, the less dropped calls you have caused by fading and multipath
signals. DA4000 is very nicely made of the finest little UHF RF modules
specifically manufacturered for cellular/PCS systems....the same ones the
emergency services use.

The comparison is simple.....
little cellphone into almost no antenna - 150mw with a negative gain
antenna, maybe .1W Effective Radiated Power, less in the car!
11db gain above 3 watts is around 32 WATTS ERP on top of the car in a
more unobstructed view. It's why a UHF TV station runs 25,000,000 Watts
ERP from 2000' up a tower....RANGE...FIELD STRENGTH...our friends!

Larry
--
No, it won't make your penis bigger.....(c;

  #4  
Old May 15th 07, 01:38 AM posted to alt.cellular.verizon
Todd Allcock
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Posts: 4,472
Default Improving reception/dropouts in car?

At 14 May 2007 17:05:35 -0400 Not Your Biz wrote:

So we're all better off! You get better reception, and we'll not have
to put up with another asshole who insists on talking on the damn cell
phone while driving!

HANG UP AND DRIVE!!!


I wonder what causes more accidents... cellphone use or road rage from
overreaction to cellphone use... ;-)


  #5  
Old May 15th 07, 02:00 AM posted to alt.cellular.verizon
pltrgyst
external usenet poster
 
Posts: 49
Default Improving reception/dropouts in car?

On Mon, 14 May 2007 17:05:35 -0400, Not Your Biz wrote:

Yeah, its called pulling over and making a call on the side of the
road or a parking lot.

That way you won't be moving (and being distracted by your phone call
instead of concentrating on driving) and able to get better reception
too.

So we're all better off! You get better reception, and we'll not have
to put up with another asshole who insists on talking on the damn cell
phone while driving!

HANG UP AND DRIVE!!!


What's your point? In DC, you pretty much don't have anything but assholes
anyway, do you? What do you want, an empty beltway?

Oh, and then there's you -- a gutless asshole, from your posting parameters.

-- Larry
  #6  
Old May 15th 07, 05:41 AM posted to alt.cellular.verizon
Larry
external usenet poster
 
Posts: 9,696
Default Improving reception/dropouts in car?

Todd Allcock wrote in news:f2b0cq$8a9$2
@aioe.org:

I wonder what causes more accidents... cellphone use or road rage from
overreaction to cellphone use... ;-)



Stupidity is number one. There's no cure for it.

Road rage is way up on the list, much higher than cellphone use, I'm
sure. There's a cure for that, but, for some reason I've never figured
out, the states never take the time to test drivers for it, which is
fairly simple at renewal time. Hell, they'll let anyone who can see
drive in South Carolina.

I read somewhere that the screaming brats, who are supposed to be
restrained in the back seat, are number 2 or 3 in causing accidents. You
know them, those ones making your next restaurant meal such a terrible
experience whos parents do nothing about them climbing over the salad bar
on the bellies eating food out of their hands like a pack of dogs.

Of course, it's hard to tell whether overwhelmed moms have road rage or
have had enough of the abuse spewing from the back seat why they all died
running off the bridge.

The cops will say she was talking on her cellphone......probably to her
probation officer or social workers.

Larry
--
Grade School Physics Factoid:
A building cannot freefall into its own footprint without
skilled demolition.
  #7  
Old May 29th 07, 09:52 PM posted to alt.cellular.verizon
Andrew Duane
external usenet poster
 
Posts: 20
Default Improving reception/dropouts in car?

Will these antennas also help with in-house reception? I live in a
just-barely-marginal area, and lose maybe 1 in 4 calls. It would be
nice to have just a little bit better reception at home to make the
phone more reliable. I can plug it into the antenna, perched somewhere
decent, and use my bluetooth headset to talk.

On May 13, 11:59 pm, Larry wrote:
wrote in news:1179107978.867816.142970
@q75g2000hsh.googlegroups.com:

Can any of you recommend an external antenna that is actually
effective in reducing dropouts and improving reception while driving?


Any of the high gain magnetic-mounted antennas for your specific band
will extend your range, within reason. The old AMPS antennas work great
if your system is on the original 800 Mhz "cellular" band. If your
system uses PCS, as many of Verizon's systems do, especially here in the
South, you'll want a different antenna made for that band, or a dual band
antenna that will cover them all, the higher the gain the better.

I've been using the CA40M fromhttp://www.cellantenna.com/Antennas/magneticmount.htm
for years. This very-high-gain 40" long dual band colinear for 800/1900
Mhz is a great mobile antenna....unless you park in a low parking garage
that will always knock it over. It IS, in fact, 40" long which makes
garaging it much trouble. It should, as with any UHF antenna, be mounted
on top of the roof, not the trunk, for maximum range. Altitude on UHF is
our friend, precisely why the UHF TV station has a 2000' tower or
mountaintop transmitter. One of the lesser antennas on this page, like a
CA12M (12" tall), is also very acceptable.


  #8  
Old May 30th 07, 02:02 AM posted to alt.cellular.verizon
Larry
external usenet poster
 
Posts: 9,696
Default Improving reception/dropouts in car?

Andrew Duane wrote in
oups.com:

Will these antennas also help with in-house reception? I live in a
just-barely-marginal area, and lose maybe 1 in 4 calls. It would be
nice to have just a little bit better reception at home to make the
phone more reliable. I can plug it into the antenna, perched somewhere
decent, and use my bluetooth headset to talk.



Yes. Radio Shack has a neat little plugin 12V power supply, catalog
number 22-501 that is a large wall brick with a built-in cigarette socket
to plug the amp into (or any 12 thingy up to 1A). They are really handy
for running mobile stuff in the house. The mobile antennas do need a
small metal object, preferably steel so the magnet will stick, such as a
filing cabinet or even just a steel coffee can to use as a ground plane
for best transmission. Just turn the empty coffee can upside down and
stick the antenna to the middle of the bottom plate. Set it in a window
or even outside if you have a way, which is better still.

For a more permanent installation, look he
http://www.cellantenna.com/Antennas/yagi.htm
Directional antennas, like yagis, have been around since WW2. They
direct your power in one direction. 10db gain multiplies the effective
radiated power of your cellphone 10 times. 6db = x4. This allows you to
point it at the best cell the house can see and nearly eliminates
multipath interference bouncing your signal off objects and terrain like
mountains. Your signal arrives stronger, cleaner, with little or no
signal arriving late (UHF TV reflections look like ghosts. That's
multipath.) The cell will command the phone to reduce power, saving you
battery loading, if your signal arrives too powerful. The big antenna
just lets you set this level at something lower, rather than running full
blast into that crappy, but cutesy, stub of an antenna it came with.

Your bluetooth headset will give you 60' of range from where the phone is
plugged into the antenna....and its power supply...making your talk time
infinite, much to Verizon's dismay on unlimited N/W...(c;

Get the antenna, first, and cable it into the operating station from up
on the roof or pointing towards the cell from a balcony post. Its
orientation is VERTICAL...like the pictures show. To get a cable made,
if you're not proficient at complex coax connectors, go to any two way
radio shop with the antenna and your phone's antenna extension cable.
They have the proper UHF coaxial cable, best connectors and the tools to
put them on right. They test the cables for proper connections and
operation. Measure how long it needs to be to go from where the antenna
will be mounted to where the cellphone will be charged/operated. Add 3'
so you can leave a drip loop on both ends and have some leeway for
measurement errors. Measure carefully. You can't stretch it if it's too
short, but can use it if it's a bit too long.

Now you need to find out what BAND your local Verizon operates on. Here
in South Carolina, Verizon uses a combination of 800 Mhz old systems in
the big cities, but is a PCS carrier in the NE quadrant, notably Myrtle
Beach where big money is made on cellphones all summer. Buy just the one
band antenna for your area's frequency band...1900 PCS or 800 cellular.
800 makes it down the cable much better than 1900. Tell the cable shop
at the two way radio store which band it's on. The shorter the cable
run, the more signal you have at the other end of the cable, both on
transmit and receive. If the system is 800 Mhz, CAY810 is a good choice
for this band. If the system is 1900 Mhz PCS, get a panel, CAY1912 with
a bigger capture area and more gain. The panel mounts well on a wall
facing the tower. They have a wall mount designed for it.

Tell anyone who asks about the antenna its a for your government work and
you can't talk about it....Homeland Security...(c;

http://www.cellantenna.com/Boosters/da4000.htm
If the antenna alone doesn't solve the problem, you're in luck! The $400
DA4000 dual-band, bi directional amp I paid $400 for a few years ago is
on sale for $199! It puts out a full 3 watts on 800 Mhz and 2 watts on
PCS....times your antenna gain! With a 10db yagi, it would max out at 30
watts ERP...enough to blow holes in most all the noise! Of course, it
won't run any more power output then the cell tells the phone to generate
on transmit. Leveling is very important on shared channels. It also has
a very nice 20 db preamp on the receive side. Mine is in my truck into
an 800 Mhz, 6db colinear. POWER is our FRIEND in any communications
system...(old paging fact....why we ran 500 watts into a very high gain
antenna at 800') Your pager didn't even need an external antenna to work
out in the boonies with those transmitters...(c;

Larry
--
Grade School Physics Factoid:
A building cannot freefall into its own footprint without
skilled demolition.
 




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