Hi all,
Any one could explain me with details,how i must solder the board to connector type N to not damage antena?
Very Thanks
I do not know if it is a simple matter of desoldering the internal antenna and adding the pigtail, or if there is more to it.
I would be interested to know as well if anyone has sucessfully modified an SM or an AP for an external antenna.
ATE Research mods the hardware. We just put up a single 5.7GHz Advantage AP on an omni for backhauling our 900MHz gear around the county. Only have the first link up (at 10.02 miles – 12dBi Omni at the AP and a reflector on the SM side), but it’s purring like a kitten. I popped open the case when we got it and it looked like they had removed the small antenna and soldered right to the board. Had a good 20 inches of cable and everything looked very well done. The really nice thing is that the ATE mods are FCC certified so nobody gets in any trouble. 
We got the mod done through DoubleRadius. Here’s a link the the ATE page at DoubleRadius: http://www.doubleradius.com/s.nl/sc.2/category.150/.f