U9GT2 antenna modification


Hello sw6lee,

Have you checked out post #8 http://www.flashmyandroid.com/forum/showthread.php?432-U9GT2-antenna-modification&p=3035&viewfull=1#post3035 ?
Is there anything else that you need ?

Good lucks,

Dave

U9GT2 antenna modification


[quote=Dave.S]Hello sw6lee,

Have you checked out post #8 http://www.flashmyandroid.com/forum/showthread.php?432-U9GT2-antenna-modification&p=3035&viewfull=1#post3035 ?
Is there anything else that you need ?

Good lucks,

Dave[/quote]

Hi Dave,

Yes, I followed that and opened it, but post 8 doesn't tell me what part of the internal is the display connector. Anyway, I put it back all together and I will not open it again. I would like to warn all Window N90 users that DO NOT FOLLOW THE FIRST STEP OF POST 8. Our device has black edges all around, and it the blade in the first step should be pushed in the BACK Edge, between the silver and black color, and NOT the edge of the screen like in the picture. I did that and the screen was chipped.. :( badly...and thought it was a mistake, so did it on another side, and the screen cracked more.... :( and figured out that the blade should be pushed in the back edge, NOT frond edge where there is screen..

U9GT2 antenna modification


Hi there I think my Cube clone (Cresta) has the same system of removing the back plate.
There are two screws in the side that you have to remove. Then take the aluminum backplate of the tablet, inserting your nails or plastic card between backplate and the plastic side of the tablet.
Check out pictures how to remove the back plate on this site

Thanks to all the info here, I could also make the antenna modification and indeed a good improvement of signal.
See the photoos here
Last edited by auwerda on Sun Jun 10, 2012 10:35 am, edited 1 time in total.

U9GT2 antenna modification


Hey guys,

I tried the internal wifi antenna from a Netgear WNDR 3800 router and the wifi reception indeed got better. The Cube can now be used anywhere in the house. Before the modification, it had to be in the same room with the wireless router.

Image
Rayspan Antenna from Netgear WNDR 3800


Image
Cube U9GT2 with Rayspan antenna.

Dave

U9GT2 antenna modification


[quote=Dave.S]Hello Wing,

If you have an old 2.4mhz antenna from an old router, such as shown here http://www.flashmyandroid.com/forum/showthread.php?432-U9GT2-antenna-modification&p=3018&viewfull=1#post3018, then give it a try.

Hello Eoghlear, I am anxious to hear your result as well.

Dave[/quote]

thanks dave if i use tp link also can right..

U9GT2 antenna modification


[quote=Dave.S]Hello Alex,

I do think that you need to try again as both inner and outer wires must be connected. The outer wire serve two purposes, grounding and shielding. I had an antenna stripped off and was ready to do the mod.

Image

The stripped off section of the antenna seemed to fit the existing area inside the Cube very well. At the time, I could not identify the solder pads and did not have a long enough shielding wire to make the complete change. Orgos helped with the info of solder pads here http://www.flashmyandroid.com/forum/showthread.php?432-U9GT2-antenna-modification&p=3086&viewfull=1#post3086. But I already had the tablet re-assembled.

I think that an antenna must be proper designed so it can tune to a specific frequency. http://martybugs.net/wireless/rubberducky.cgi. So I think that replacing the antenna with a proper one as shown on my picture should work. For the same reason, the back plate cannot be used as a replacement antenna, and it must not contact the antenna.

A better router may help, but I doubt it. My router is a good one. My laptops and other tablets can connect to it anywhere from my property, front yard and back yard. But the Cube can barely connect if there is an obstruction between it and the router.

Perhaps I need to forget about the excuses, as you said :indecisiveness:. But . . . there are so much to do :confusion:

Dave,[/quote]
dave you got final pics on how to fix this antenna on cube u9gt2

U9GT2 antenna modification


Hello Wing,

I tried another antenna as shown in post #44.
Here is another picture with information marked

Image

Dave,

U9GT2 antenna modification


Someone mentioned that this antenna would work fine

Image
Tyco antenna part number ELECW F-1 94V0

It can be purchased from here:
http://www.amazon.com/gp/product/B001UG0LE8/ref=ox_sc_act_title_1?ie=UTF8&m=A2P6GX0MLH82KM

Dave

U9GT2 antenna modification


Hi all.

After some tests and with the help of a colleague of HTCMania (thanks SERCAB) I think, I have a possible the solution to the problems of wifi.


First, isolate the case and the antenna, this is very important.


Secondly, the problem of few tablets U9GT2 comes because the connectors introduce noise to the signal. Well, doing some modificacines I got what I teach below.


Image of the tablet, in red the two antennas installed.

Image

Detail of the connector with the two antennas.

Please note where the second antenna has welded

Image

Previusly the same tablet with a single antenna

Image

This is the source of the noise. When tinplate the second antenna, at least to me, I have solved the problem of coverage, improving the signal even in my U9GT3.

My test.

Image

Details with U9GT2

Image

U9GT3

Image

This is all, when install a second antenna and close the circuit, the signal showed an improvement over how it worked before.

End of report. ;)
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U9GT2 antenna modification


Hi guys,

Is there ANY way I can modify the antenna without soldering? And not spending much money?

THANKS

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