Questions Please Help. I have never setup a base station before and need a little help please.

First when I get my new antenna I can set the SWR with the antenna lower down than it will be mounted? Second Will it have to be readjusted when I change radios? Third Both radios I have now have a 1 watt dead key and swing to around 18, do I set the SWR with just a dead key or modulating? Fourth is battery voltage going to be enough to get max power out of the radio? I ask because I have noticed in the Jeep that when the engine is off the signal during modulation is less than when the engine is running. Fifth do any jumpers need to be the exactly the same as the coax? I didn't think to order any LMR-400 jumpers.

I think that's it for now, but there will probably be more questions. Please feel free to mention anything else relevant and thank you very much for any help you can give.