Originally Posted by SVAuspicious
+1 on the butane torch. The key is to get a lot of heat into the metal quickly, get the solder to flow, and get the heat off before the insulation melts.
I also some times clamp my Ancor single ratchet crimper, the one for heat shrink terminals, over the pin on the connector to use as a heat sink if it is windy. This keeps the heat at the pin and not into the insulator. When done I pop the quick release on the ratchet mechanism and snip the center conductor back some.
Even good solderers can have BAD connections when doing this at the top of a spar. With a good heat sink and a mini-torch it works flawlessly and is repeatable. Wish I could say the same for the shield/braid but I have not found a good way of doing this in the "weather'...