Correction:
Roy Lewallen wrote:
>
> Mathematically, vp = c/sqrt(1 - (f/fc)^2)
> vg = c * sqrt(1 - (f/fc)^2)
That should be:
vp = c/sqrt(1 - (fc/f)^2)
vg = c * sqrt(1 - (fc/f)^2)
I apologize for the error.
Roy Lewallen, W7EL