You are aware that the center conductor is copper coated aluminum?
- 'Doc
What difference does that make, RF only penetrates microns into the surface area anyway, due to the skin effect, vould have liquorice inside the cable and wouldn't make the slightest difference! Plus aluminium is almost as good a cunductor as copper is, I fail to see the point your making. Many cables have steel centre copper coated conductors, don't mean its a bad cable As long as copper coating is high quality ofc and deep enough to overcome skin effect, it will be the same performance at RF frequencies as a solid copper cable.
Its the reason the gainmaster and T2LT dipoles work so well as they utilise the skin effect.