My adapters mostly consist of a short piece of coax with a PL-259 on one end and an F on the other. I bought flooded because much of it was going to be lying on the ground outdoors. And water is death on coax if it gets inside due to animal bites, etc. Get some good crimp-type connectors. Those are on my to-do list. There's a thread here about that: try searching for snap-on F connectors. I'll second that, with the emphasis on the word "MANY". I've been a ham since 1976, and almost all the coax I have ever used was 75 ohm: CATV hardline, RG-59, and RG-6. It can be obtained very inexpensively. I just got a free 1000' roll of messenger aluminum braid RG-11 with connectors and crimping tool. It was expensive to ship, but rest assured, it'll be used here. That page is a real eye-opener. I suggest reading the graph there. I regularly run 700 watts on 160 CW through RG-6 and F connectors, and I know people who run 1500 watts through it. Why waste money on 50 ohm feedline if you don't need it? Think of all the money saved towards more important things.