Archived from groups: alt.cellular.verizon (
More info?)
"Bob" <rfa5@optonline.net> wrote in message news:<qF%Yc.29470$Es2.11927094@news4.srv.hcvlny.cv.net>...
> Can anyone tell me what has been their experience using a mag mount antenna
> on their car? I have the LG VX4500 and we all know they are poor RF
> performers. I was thinking of getting a mag mount with the adaptor to
> attach it to my phone if indeed it does help. Theoretically it should work
> better but in real life does it really help out? Any comments or
> recommendations as to what and where I can get a decent antenna? Thanks!
>
> Bob
Short answer.
Don't expect miracles from a magmount, just a consistantly higher
signal.
Check the Wilson site or Canyonriver for the correct adapter cable. I
recommend a dual charger adapter cable.
All those wires can be a hassle to deal with. The charger type adapter
disconnects your phones antenna COMPLETELY, so remember that using
just the charger, without the magmount to make calls, will provide
very poor signal levels. I works very good when charging and talking
with the antenna hooked up though, especially in analog areas, where
batteries drain rapidly.
Watch for hyped up "test" measurements and look for substance and
quality materials. The design was worked out long ago and most have
very similar levels of performance.
After taking some RX measurement using the testmode screen, which I'm
sure does not tell the whole story about signal performance, nor is it
the most accurate test, it seems .... the signal was about the same
strength if I stood outside my car with the phone's (excellent)stock
antenna OR hooked up to either of a couple of standard 12 inch long,
spring type, mag mount antennas.
Ideally I should record both RX and TX values while making calls.
My audiovox 9500 has a very good, stock 1/2 wave antenna, 6" long
antenna.
Inside the car there was a big difference using the mag mount. The car
body blocks a lot of signal.
Used the RX measurement units INSIDE the car... -83-84db stock antenna
removed entirely -73-75 stock antenna, down position
-60-61 Wilson (dual band) mag mount
-57-58 Nynex Single Band
-58db Outside the car, stock antenna only
It's important to remember, hooking up combo CLA/ external antenna
adapter cable, causes the phones own antenna to be completely
disconnected (or it should).
So, the external antenna has to make up for the loss of the stock
antenna gain and then provide any potential signal improvement, in
addition.
A phone with a less than ideal (stub/patch designed for looks?) stock
antenna, would likely benefit the most from a magmount.
Note: the Nokia 3589i (internal patch antenna) is one of the BEST
performing phones, but since there is no hardwired external antenna
adapter, it's hard to compare with any other antenna hookup. Either
the phone's receiver is incredible, to make up for the patch or the
patch antenna design is some kind of breakthrough. I'd like to think
reception with another antenna could be MUCH better and when someone
finally adds a little external antenna port to the 3589i, they will
know for sure!
Also, there are even more loses all along the signal path, when using
an external antenna. The adapter cable, each connection and adapter
barrels. Any long length of cable can have a high loss, unless the
appropriate quality for the distance, shielded cable is used.
*The Wilson uses longer and thinner cable 9.5 feet of RG 174u. Fits
better through a closed door but has a fairly high loss. It's also a
dual band.
The Nynex has 6.5 feet of Belden RG58a/u
The cable type used can make a difference, since better made, thicker
cable loses less signal.
In real world use as well, the magmount seems to provide only a little
improvement over the stock antenna, if compared with the phone held
outside the car, in the same location. The magmount removes any
obstructions caused by the car body or tinted windows, or one's own
head, inside the car.
It would also seem, a magmount, for a fixed location, would remove the
obstructions caused by the walls or house, but doesn't boost the
signal a great deal, unlike a Yagi. There's also some gain getting any
type of antenna up higher. A magmount mounted on a pole, could be the
alternative to making calls from the rooftop.
There's longer, higher gain, magmount antennas. I have not used one,
but they get extra gain by concentrating the antenna signal more
towards the horizon. Since I travel in the mountains and towers are
usually atop hills, high gain magmounts may actually reduce the
signal "seen" by the phone, and could miss the towers high up. If one
were out on plains or wide open country, the high gain designs may be
more useful.
Yagi antennas, although not useful for a car, since they require
aiming at one tower, really do boost the signal significantly, over
the stock antenna.
I bought a 12" Wilson Mag Mount for $39. There's a piece of vinyl tape
on the base covering magnet. The tape is starting to scrap/peel off
with just a little use
The ball on the end fell off
It performs about equal to an old Nynex mag mount antenna I own.
Appears to be made cheaper, with a big marketing hype. Good
warranty/CS. Wilson replaced the anntenna with another one. The ball
was replaced by a plastic nub. The other styles of Wilson antennas may
be better?
Wilson Electronics, Inc. - Wilson Magnet Mount Cellular Antenna
http://www.cellularantenna.com/antennas/wcmagnet.htm
Check out this antenna forum for more info Cell Antenna Corporation
Q&A Forum
http://www.cellantenna.com/.cgi-bin/ultimatebb.cgi
Index - How to Improve Cellular, Nextel and PCS GSM Reception
http://www.criterioncellular.com/tutorials/index.html
Criterioncelluar has been a good resource. They are less hype and more
practical info. Local to (SF) and sell mostly pro-grade and American
made antennas/parts.
They can also make up any length and type of cable/termination and are
very knowledgable.
Bought an Antennex Yagi and parts from them and got good help quality
products*.
At least there are good pictures, showing how to identify the various
types of connectors used to connect handsets, cables, adapters and
antennas. With so many connector types, it can be confusing.
Haven't used their 3 watt booster, but I'm curious if anyone has a
review or compared it to the popular (BDA) Cellantenna sells? It's FCC
compliant, which is important. Yet another, 3 watt booster sold by
Wilson, does not indicate an FCC approved design?
The difference between quality antennas/parts and cheaper imported
stuff, often seems like OEM compared to aftermarket accessories. Both
units will work, but the cheaper parts do not hold up as well and
overseas construction and materials are often inferior.
*Despite getting an American made, welded and tested Yagi antenna, the
last element of 6, on the end, was mounted a couple of degrees off
perpendicular. Antennex replaced it for free, including shipping and
said the holes had been drilled slightly crooked, before welding.
It still worked fine, but makes one wonder about the state of American
manufacturing.
After all, the reason I paid $120 for a welded, 6 element Yagi,
instead of riveted import, was that each Antennex antenna is claimed
to be tested and tuned to specs. I thought welds would hold up better
as well under rough use, like getting carried in a car trunk.
-
David