On 4/26/2013 10:36 AM, GARY HUBER wrote:
Great discussion site. Note this piece applies to ALL aluminum foil
and copper braid construction shielded coaxial cables not just LMR-400.
It's also important to realize that loss in coax below about 500 MHz is
due ONLY to copper losses (I squaredR). The only effect of the
dielectric is to allow a larger diameter center conductor for a given
shield diameter (unless, of course, the dielectric contains water).
Several years ago, I put together a tutorial on coax for use on the HF
bands in the form of a Q&A. It includes considerable discussion of
fundamental concepts, a table listing various good coax cables with
their loss characteristics, and lots of other useful information.
http://k9yc.com/Coax-Stubs.pdf
73, Jim K9YC
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