Samsung A411 - antenna advice sort

Submitted: Thursday, Feb 12, 2009 at 09:49
ThreadID: 65908 Views:2163 Replies:8 FollowUps:4
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As a result of the very welcome input on the forum I have purchased a Samsung A 411 Mobile phone to act as the modem for my computer.
The first attempts to send data from around Cape Conran from the Van were a failure, so I now propose to purchase an extension antenna. I have had recommended the "Next G / GSM 8dBi Omni Antenna - Magnetic Base - Collapsible 3 pieces" at a cost of $110, plus the patch cable for a further $22.
You will appreciate that this considerably more than the cost of the phone!

I seek advice as to whether this is the correct type of antenna. My major use will be inland NSW, NT and WA.
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Reply By: troopyman - Thursday, Feb 12, 2009 at 09:58

Thursday, Feb 12, 2009 at 09:58
This explains uhf aerials but would be the same for phones maybe .Site Link
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Reply By: Member - Fred B (NT) - Thursday, Feb 12, 2009 at 11:25

Thursday, Feb 12, 2009 at 11:25
were you getting a good signal strength on your phone when connected to your PC? Do you even get good siganal strength on the phone normally? If the answer is yes, then the sending of data is a setup problem, not an aerial problem. I would check that first. I had a similar issue with my Nokia, and it turned out that telstra was blocking me from sending data even though I had paid for a data "pack". It had not been set up correctly their end.
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Reply By: Member - Mike DID - Thursday, Feb 12, 2009 at 11:29

Thursday, Feb 12, 2009 at 11:29
You really need to quote the brand and model number to get feedback on a specific antenna.
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Reply By: Warstar - Thursday, Feb 12, 2009 at 13:10

Thursday, Feb 12, 2009 at 13:10
no I was not getting a signal on my phone when the data transmission failed.

The link to the antenna is below. I do not have any further info

.http://store.comnet.com.au/details/2231653.html
AnswerID: 348722

Follow Up By: Member - Mike DID - Friday, Feb 13, 2009 at 10:31

Friday, Feb 13, 2009 at 10:31
That's a LOT of money to pay for an antenna that should cost around $30.

For a little more you can get a "broomstick" style antenna that can be permanently mounted and will give a stronger signal.
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Reply By: Von Helga - Thursday, Feb 12, 2009 at 16:53

Thursday, Feb 12, 2009 at 16:53
See Thread 65453
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Reply By: Cruiser 2091 - Thursday, Feb 12, 2009 at 21:19

Thursday, Feb 12, 2009 at 21:19
Have you looked at Telstra's coverage maps because there are a lot of areas where mobiles will not work.
AnswerID: 348787

Reply By: Member - sdr00y (Beecroft) - Thursday, Feb 12, 2009 at 21:47

Thursday, Feb 12, 2009 at 21:47
I have been into the shop front for com net and spoken to the guys there. I have an A412, which as I understand is essentially the same as your phone. That is the aerial he recommended to me.

He did say that for best results it needs to be placed on a metal (ferrous not aluminium) surface such as car bonnet or roof.

I have not yet purchased one so I can not say anything about actual use of this item.

Hope this helps.

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Follow Up By: Nomadic Navara - Friday, Feb 13, 2009 at 15:11

Friday, Feb 13, 2009 at 15:11
You only notice the only difference between mounting the magnetic base on steel over aluminium when you are moving. The only difference is that the antenna will blow off.

For caravan use strong wind may blow the antenna off. Whilst it is sitting there in place there will be no electrical difference. If you wish to have the peace of mind of having the antenna magnetically stuck there, just stick a piece of gal sheet steel to the top of the van. The steel should be 300 mm or bigger, round or square.

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Reply By: Warstar - Friday, Feb 13, 2009 at 13:08

Friday, Feb 13, 2009 at 13:08
sdr00y (Beecroft) that is interesting. I intended to affix a small metal plate, just big enough to take the magnetic base, to the roof of my caravan (in a spot that I could reach thru a hatch).

It sounds, from the info you got that the antenna works best with a "field" (is that the correct term) around it.

What do you think?

Mike DID Do you know where I can get antenna for the sort of money you mentioned?
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Follow Up By: Member - sdr00y (Beecroft) - Saturday, Feb 14, 2009 at 12:19

Saturday, Feb 14, 2009 at 12:19
Warstar

I think it is termed "ground plain"? Not "field" as you describe it. From what he was saying the ferrous metal helps with the signal, not just having something to stick the magnet too.

In my case I was talking about putting the aerial on an aluminium fold up table compared to the bonnet or roof of a car. He said to me the bonnet or roof of the car would be preferable to the table due to the ferrous metal thing, not due to the height of roof or bonnet over table. My situation is that I would like an aerial that can be moved around not just permanently mounted on my bullbar. A non fixed one will suit the flexibility I want. I can have it while driving or while stationary in the carseat, or can sit in a more comfy chair with laptop on table and aerial on car bonnet.

He did not say the aerial will not work if not mounted on ferrous metal (the magnet will obviously not stick on non-ferrous things) but he did say the aerial will work BETTER if mounted on the ferrous metal. He also suggested placing it in the centre of the bonnet or roof area rather than one corner or one side. That way you get a more even signal in all directions.

You could always ring or email com net and ask them about it. Tell them what you are thinking of doing and see if they think a bar mounted one or a magnetic one would be best for your situation.

I don't agree that you could get a similar suitable aerial for 30 bucks or so.

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Follow Up By: Member - sdr00y (Beecroft) - Saturday, Feb 14, 2009 at 12:21

Saturday, Feb 14, 2009 at 12:21
Apologies to "Mike did" also. I have misread your post. I thought you meant that a broomstick one could be picked up for 30 bucks, but that is not what you said.

Sorry.

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