However on the lower frequencies, such as 160 and 75 skin depth plays an
important roll. I believe the flash plating as is found on steel core,
center conductors is insufficient to keep I^2*R losses down.
I'd avoid those cables with small, solid center conductors.
That brings to mind the question of LMR400 which has a "relatively"
large copper plated, solid Aluminum center conductor versus cables like
BuryFlex with stranded, copper center conductors. LMR-600 is larger yet.
They give loss ratings per 100 feet, but what about 160 and 75 meters?
73
Roger (K8RI)
On 8/4/2016 Thursday 2:37 PM, Jim Brown wrote:
On Thu,8/4/2016 11:23 AM, Mike Fahmie via TowerTalk wrote:
power loss (I^R is usually negligible).
Mike,
Exactly the opposite is true -- below at least 300 MHz, loss in
transmission lines is ALL I squared R. Dielectric loss doesn't begin
to be significant until you're well into the UHF region.
73, Jim K9YC
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73
Roger (K8RI)
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