A N connector is designed for 1KW power and is half an inch in diameter :) ...

It seems difficult to find the exact type of this connector even if it's present on a high number of phones.
It may be a MC-Card, Hirose MS-147 is also probable:

http://szwholesale.com/ebay/2/Antenna/3G-combination/antenna_connector-1.jpg

You might find a short pigtail that converts this connector to SMA, then a more classical SMA-anything , maybe SMA-N or SMA-BNC followed by BNC-N.

Regards
Sebastien

On Thu, May 19, 2011 at 7:27 PM, Gianni Tedesco <gianni@scaramanga.co.uk> wrote:
On Thu, 2011-05-19 at 19:03 +0200, Sylvain Munaut wrote:
> Hi,
>
> > So how does it work "off-air"? I'll need a shielded cable and attach
> it
> > on to the antenna pads of the handset?
>
> You need to use a RF 50 ohm coax cable. The Racal has a N connector
> and the phone should have one has well. I don't remember the exact
> reference of the C123 connector but I know digikey has adapter to SMA
> for it, so I use a N to SMA then an adaptor that depends on the phone.

The unit I'm getting should come with a "BNC to N-Type connector" but I
thought n-type was maybe 2cm diameter? The connector on the phone (C139)
is tiny, I have just uncovered it...

If I understand correctly, I need a special connector for the phone and
then maybe another one? eg. N to SMA depending on what the special
connector provides...

Looking on the list archive someone suggested:
http://shop.meconet.de/artikeldet.php?suchspeicher=110448&proid=550&bez=Crimp%20male%20MS-147,%20CG-B1%20-%203.0mm,%200-6GHz,%2090%B0%20r/a

But no reports as to whether it worked or not.

Probably I should just get a cheap car-antenna for the phone and rip the
connector out for my own cable...

Thanks

Gianni