[TowerTalk] Coax Losses on 160 and 75?

[Roger (K8RI) on TT]

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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