This plot is for a 110' multiband antenna fed with 30.9 feet of 300 ohm twin lead. The measurements were taken with a 1:1 balun inline. The measurements were taken AFTER the balun. Click on the image to enlarge.
There are many ways to solder PL-259 connectors. I find this approach to be quite good. The tinning works great to insure a good connection of the braid to the connector. I use a cable stripping tool to trim the excess shield.