N4KG wrote:
> Mathematically, calculate the rotational radius to
> the reflector tip and the director tip from points along
> the boom until they are equal.
> (R/2)^2 + Br^2 = Rr
> where R = Reflector Length,
> Br = distance on boom from reflector to test point
> (D/2)^2 + Bd^2 = Rd
> where D = Director Length,
> Bd = distance on boom from end director to test point
Sharpen that pencil and renew those algebra techniques
and, FWIW, this reduces to:
Bd = 0.5 * ( ( ( (R/2)^2 - (D/2)^2 ) / Bt ) + Bt )
where Bt (total boom length) = Br +Bd
73 Mike N2MG
|