Join Date: Aug 2001
Location: Salt Lake City, UT, USA
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RG-6 is definitely the way to go. It also has a heavier gauge center conductor that provides a bit more current-carrying capacity.
Also, if I recall correctly, the dB scale is logarithmic, so a difference of 1.0 in the loss measurement represents a 10x (or ten times) loss or gain, which is not at all insignificant.
RG-6 is designed to carry the much higher frequency signals used with the sattelite hardware, whereas RG-59 was designed to handle just the broadcast frequencies which are significantly lower.
When push comes to shove, do you want a system that is properly specified for its intended use or one that may or may not be "good enough?"