As said before, RG142 is going to be your best bet. I used it on my first repeater. I still have two jumpers here for a mobile duplexer that had (of all things) SO-239 connectors on it, so I had to make two jumpers with Mini-UHF and PL-259 connectors.
Before I sold the repeater, I changed duplexers so I kept these jumpers. RG142 is very easy to work with and is shielded very well. RG58 - not so much. If you used RG58 for jumpers, just expect desence (receiver overload) and possible permanent damage to the receiver.
Just for reference, I used RG142 jumpers on a mobile duplexer with two Spectras. They were set up with a homemade controller that allowed the passage of encryption (DES - and no this was not a ham repeater, it was used by the military). I also used 50 feet of Andrews 1/2 inch hard-line and a DB Products DB-404 (406-420 Dipole array). The antenna was up at 25 feet (about 50 feet above sea level) and we had hand-held coverage of about 7-8 miles. We were about the highest point around as we were on the coast. The beaches (which were obviously lower than the repeater) had the best coverage.
As a side note, our range increased about 2 miles when the encryption was disabled as we were using straight DES, not DES-XL.
So unless you are very high, your coverage is not going to be anything of great value. Just remember, the higher you go, the more loss you'll experience. That goes for RF as well as monetary loss... :wink:
