Internal Aerial for 7110

[8310-GUY]

Does nay one have a step by step guide on how to make an internal aerial for a 7110, found a photo of it done but no guide, if any one knows of a site or has a site that gives a step by step guide i would be appreciative.

here is how the internal aerial looks any way



for people with a SONY J5 here is a site with a step by step guide on making an internal aerial

<a href="http://www.1sthandy.de/apportal1/apportal/index.php?site=seitej5ant" target="_blank">J5 Internal Aerial guide</a>

here is a piccy to show what it can look like

and 1 more here

[Junaid]

up

this is fantastic idea. any retailers that will do this for you. (im too lazy to actually do it myself <img src="biggrin.gif" border="0"> see)

[Lonegunman]

Is it me or does the 7110 now look like the 6210 may be a clue. <img src="confused.gif" border="0">

[Dave.W]

hi, i did this on a 5130 long time ago, take the phone apart and in the top right corner on the main pcb (screen side) is a copper contact that the normal ariel touches. get a thin strip of copper or ***** and solder one end to this contact point. inside the actual phone casing, you need to scratch off all the silver coating on the area the new internal ariel will be in as it stops the signal passing. then run the strip along the inside and re assemble the phone to check you get good signal. <br />the hardest part is making the outer of the phone perfectly smooth once you take the ariel holder off it. just get a knife and heat up so it cuts through the plastic then put a thin piece of aluminum on the underside of the hole and spread melted plastic (melt what you removed earlier so its the same colour) over this and remove internal aluminium. looks nasty though <img src="frown.gif" border="0"> <br />once you strip the phone you will see what i mean, theres a line moulded in to the plastic inside that looks like it was made for internal ariel <img src="smile.gif" border="0">

[8310-GUY]

cheers for the replys. ill jus wait and see if someone releases a housin with an internal aerial<br />like they have done for the 51\61xx series, would look cool though.. or i might just biy a 6210 <img src="biggrin.gif" border="0"> easier

[en4rab]

From the looks of the picture and my Grade D GCSE German it looks like the original aerial has been removed and replaced with a bit of laquered copper wire glued into the gap between the upper and lower case presumably with a small hole drilled in the case near where the aerial was so the wire can be connected to the aeriel pad inside. Then cut the aerial socket off the case fill with body filler and paint. I think the optimum length of the wire is 1/4 of a wavelength but you will have to check on that, from the looks of it just glue the copper wire in the gap once it is connected , if you do this i would suggest painting or varnishing the wire to prevent the risk of electric shocks from the wire.

<FONT COLOR="#ffff00" SIZE="1">[ 12 January 2002 13:43: Message edited by: en4rab ]</font>

[zauberflo]

I think it´s not a very good idea, because you won´t have enough reception with this internal cable. A friend has tested it with his 5110......

[8310-GUY]

i modded the case got it all perfect then i went and trud on it and broke the back casing, anyways i was wondering if any one knows what the uk networks are classed as, A - Networks B Networks etc, i think there is around 4 groupings, dont quote me on this as i only read this on another forum, and it said E networks GSM 1800 = 4.5cm of wire for the internal aerial

[quote]Mangels D-Netz Karten hab ich es leider in diesem Netzen noch nicht probiert...<br />Da die D-Netze aber mit 900MHz arbeiten, entspricht hier 1/4 der Wellenlänge der Hälfte der Wellenlänge von E-Plus (8.3cm) und es sollte deshalb auch ganz passabel funktionieren. Aber wie gesagt, noch nicht getestet....

Folgendes zu den Längen der Antennen, gefunden bei Handyberater:

---cut <br />Wie finde ich die richtige Antenne?<br />Die häufigste Antennenform ist die Stabantenne. Die Länge der Antenne richtet sich nach den Wellenlängen des entsprechenden Funknetzes. Die Wellenlängen lassen sich aus den entsprechenden Frequenzen berechnen. Theorie und Praxis haben recht gute Antennengewinne festgestellt, wenn die Länge des Antennenstabes einem Viertel der Sendewellenlänge entspricht. Damit ergeben sich Antennenlängen von:

Netz Frequenz Wellenlänge Antennenlänge <br />C-Netz 450 MHz 66 cm 16,5 cm <br />D-Netz 900 MHz 33 cm 8,25 cm <br />E-Netz 1800 MHz 16,6 cm 4,15 cm <br />---cut

icy <br /> <hr></blockquote>

info taken from <a href="http://www.handykult.de," target="_blank">www.handykult.de,</a> now if i only understood german

[GSM Coolhawk]

Hi all

Regarding internal antenna, it's possible to buy cases finished. I have 2 5110 myself, which I changed LED's in and fitted a new casing, take a look at the pistures here and you'll see for yourself <img src="smile.gif" border="0"> The red arrows indicates the internal antenna.

Casings I can get for those interested at 8 GBP in all imaginable colors

<br />



Regards <img src="biggrin.gif" border="0">

[CW]

Wow that looks well but what the red x for is this where the ant used to be <img src="biggrin.gif" border="0"> <img src="biggrin.gif" border="0"> <img src="biggrin.gif" border="0"> <img src="biggrin.gif" border="0"> <img src="biggrin.gif" border="0"> <img src="biggrin.gif" border="0">

CW

[landy]

I did it sucessfully, reception is OK. and phone works 100%.-

BR Landy.- <img src="eek.gif" border="0"> <img src="eek.gif" border="0"> <img src="eek.gif" border="0">

[future]

I did it on mine but it never gets full signal, the antenna is an aluminum foil cutted in zig-zag fitted behind the lcd.

[nsm-1]

The [German] information in the text quoted in 8310-GUY's post is somehow thin. I'll try to sum it up because it's a lot of text and contains only little useful information.

A few things before we start:

1. a) "D-Netz" = Class "D" net = 900 MHz GSM network
   b) "E-Netz" = Class "E" net = 1800 MHz GSM (DCS?) network
   c) "lambda" is the wavelength of a signal at a certain frequency.
   d) At 900 MHz lambda = 33.33 cm and (lambda/4) = 8.33 cm
   e) At 1800 MHz lambda = 16.67 cm and (lambda/2) = 8.33 cm

And here we go:

This guy states that because of terms d) and e) operation should be very well with a 8.33 cm antenna but he has not tested it yet. This seems correct to me when I remember my experiments on amateur radio ...

He also reports that (quoting "Handyberater" - http://www.handyberater.de/) the most common kind of antenna is a [simple] pole antenna.

The length of the antenna depends on wavelength/frequency of the cellular network. It has been shown in experiments that pole antennas of length of one quarter of a wavelength are working best.

"C-Netz"

• f = 450 MHz
• lambda = 66 cm
• lambda/4 = 16,5 cm

"D-Netz"

• f = 900 MHz
• lambda = 33 cm
• lambda/4 = 8,25 cm

"E-Netz"

• f = 1800 MHz
• lambda = 16,6 cm
• lambda/4 = 4,15 cm

That's the essential information I think.

-------------

My personal experience in building antennas for an old 5110 is taking a piece of wire length of lambda/4 (8.3 cm) and wind it round a stick with 3mm in diameter, so the hole antenna looks like a "spring" and takes up only some cm. This works quite as good as the original antenna of 5110 (I guess it's using the same system inside).

I can take some photos if anyone is interested, but I have no webspace to put it onto - so if anyone will provide some kBytes I can upload or mail them.

So if you take a piece of wire 8.3 cm in length and manage to hide it somewhere in your phone where no metal parts are in range then you should be lucky as it should work.

[future]

I am interested in these photos and can serve them, email to me please.