I use 3/4 inch 75 ohm CATV hardline for all my runs over 200 ft.
Loss is ~0.3+ dB / 100 ft at 28 MHz which comes to ~2 dB
for 600 ft on 10M, about the same as 200 ft of RG213 !
My most RELIABLE connections have been simple splices,
center conductor soldered to center conductor and flexible
coax braid hose clamped to the jacket of the hardline, using
a ground lug soldered to the braid. Stick the end UP and put
a plastic bottle over it, bottom open, for WX protection. Black
tape protectes the plastic bottle from UV deterioration.
On 10M, you need to match each end to avoid large impedance
transformations. For the the lower bands, I simply make the lines
a multiple of 1/2 WL.
Tom N4KG
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