In a message dated 11/2/01 11:08:56 AM Eastern Standard Time, K3BU@aol.com
writes:
> aa4lr writes:
> > Now, pi/2 wl divided by 50 is pi/100 -- which is 0.0314159..., and pi/2
> > wl divided by 60 is pi/120 -- which is 0.02618. Close, but not quite
> > 0.025.
>
> Simple,
> Tom is (always) right, you are using wrong Pi(e :-)
>
> Yuri
>
Actually it is a little less.
Just to be more precise and not to accumulate errors while lying out radials
:-)
AA4LR example is valid for the length of the arc with radius of the radial
length, being .25 wavelength and that is 0.02618 wl.
Proper formula for the straight distance A between the tips of the radials
(length R) and number of radials N is
A = 2R sin 180deg/N
so for 60 radials .25 wl. long
A = 2 x 0.25 x sin 3deg
A= 0.5 x 0.052335956
A= 0.026167978 wl.
For those who want to be precise, as they say, hope it helps.
Yuri, K3BU
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