Back in 1997 N6BV and I did some testing using "ladder line" (not the real
600 ohm stuff) and some 9:1 baluns on each end. We were looking at a site
in YV where the beach was about 1000' from the hotel room. We tested the
following:
- loss in back to back baluns
- loss in 100' of ladder line and baluns on each end
When I first moved here I installed a 1500 foot long ladder line with #8
AWG. With 2.75 inch spacing the #8 bare solid copper was 450 ohm. This was
a good spacing for the line, the impedance making the line easy to construct
and easy to build efficient baluns.
Measured loss on that line was in the .25 dB range on 4 MHz, including
baluns.
Unfortunately regular window line is neither 450 ohm, or as low loss as is
published most places (or calculated in some calculators). Some of the ARRL
stuff shows half the real loss.
73 Tom
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