Well I finally have managed to bring the "Hammond675" repeater online, at least on an experimental basis. The repeater consists of two Motorola CDM1550 LS radios, a simple controller, duplexer, 50' RG213/U coax and a simple UHF antenna mounted around 42' on the peak of my home's roof.
I don't expect great coverage with only 10 watts, but that's the best I can afford at the moment. When spring comes around again, I'll have a friend who's still able to climb around install a better antenna and 1/4" Superflex Heliax cable. I'll also replace the jumpers to the duplexer with 1/4" Superflex Heliax at the same time.
Now if I can just figure out why the transmitter starts at 12 watts, droops to about 5 watts, then within one second ramps back up to a steady 10 watts!
Having looked around carefully, I've modified my original plan to use 467.725 and have set the system to use 467.675 PL xxx.x since no one within 70 direct miles from me is using that frequency.