I finally got hold of some u.fl - NM pigtales and will change them tomorrow and let you all know what happens. With this pigtale we save about 5cm room in the enclosure. The lid is metallic and i suspect a shortcut in the 5GHz signal because of what we did.. Anyone knows if this could have damaged the SR5 cards? More because we rent a $200/Hour lift to get on top of this and have 7 radios up there and perhaps we should change the SR5's as well instead of learning the hard way
if that is the case, I suggest you test your unit at least 48 hours before you put them up there.
you can also simply test your pigtail with multimeter to make sure that the center cable is not disconnected. and even test it with actual unit under heavy bandwidth.