[rabbit73]

Your tests confirm the voltage drop problem in a long coax run. The RG11 not only has less signal attenuation, but it also should have less voltage drop for a preamp.

Originally Posted by dustyz

I found this link, and it's very educational for those who don't understand the basics, like me. :-)
http://www.hdtvprimer.com/antennas/basics.html

There is a lot of good basic information on hdtvprimer.com, but some of the preamp and antenna models are no longer available.

Keep in mind that every reception location is unique and requires a custom solution.

Calaveras also did a page on noise and preamp gain:
http://www.aa6g.org/DTV/Noise/noise.html