[TowerTalk] LMR600 male DIN

[Jim Brown]

On Sun,9/4/2016 10:38 AM, Grant Saviers wrote:
> And if losses are resistance driven at HF, how can the loss per 100 ft 
> at 10MHz be essentially the same for all three and the lowest 
> resistance cable have the highest loss?

Probably related to skin effect. conductor thickness, and the precise 
o.d. of each conductor in each cable. At RF, resistance is related more 
to o.d. than to thickness, but at DC, it's all cross sectional area of 
each conductor.

Example -- say the center conductors of two cables have the same o.d., 
but the thickness of the tube that forms it is thinner in cable #2. So 
cable #2 will have higher DCR, but the two cables will have the same 
center conductor resistance at RF. And, of course, the same variables 
apply to the shields.

73, Jim K9YC