IM trying to find out how "good" a coax is at keeping the signal inside !

If I put say 100w "RF" into a length of RG59 coax , into a 50 ohm load,

and transmiter and load are "shielded", all properly conected etc etc,

how much "signal" would get "radiated" out of the coax.

So I know cable loss v frequency , db ,

I know about resistance,

but hat number in the data sheet would tell us how much power gets leaked out the cable sides?