[BC] Power handling of 1 5/8 foam coax.

[Dave Dunsmoor]

> Andrew LDF7-50A 1-5/8" foam Heliax is rated for 143 kw average power 
> at 1 MHz, and 145 kw peak power. That yields a derated carrier power 
> of just under 27 kw at 125% modulation with unity VSWR and normal 
> ambient temperature.
> 
> The power derating formula for AM is Pmax = Ppk / ((1+M)^2 * VSWR), 
> where Pmax is derated carrier power, Ppk is rated peak power, and M 
> is the modulation index (1.0 = 100%).
> 
> Dale H. Cook, Chief Engineer, Centennial Broadcasting, 

Good formula to know. And look at the difference between what I found
on a quick search and what Dale found (or knew). 310kw vs 145 kw.

Dave Dunsmoor