Now the math.
a) Total overall length (both limbs, stingers and center connector) = 460 divided by frequency (in mhz)
b) Total single limb (plus stinger) length = (a) divided by 2
c) total “driven” coax section = 325 divided by frequency (mhz)
d) Single limb “driven” coax length = (c) divided by 2
e) Single stinger length = (b) minus (d)
Uhm … yeah. You’re right. Confusing as hell.
Probably better to just include the following explanations from K3DAV.
Figure 1.
Our center connector will take the place of the middle section indicated by the big black arrow.
Figure 2 (3a)
Here the “tail” section is your stinger, but we will be using PL259s and a shorted barrel connector in the place of the indicated soldering.
Now attach a soldered PL259 onto each end of both “driven” elements, and one end of each tail section/stinger.
Smoke/continuity check everything, and then set a short barrel connector into a vice, and drive a self tapping screw into the center of it, to short the internal conductor to the outer shell.
Assemble the parts as seems logical, and then prop it up off the ground as high as you can, and using an analyzer or SWR meter, tune it to the intended frequency of use.
And …
That’s just about it.
Enjoy!
Comments, criticisms and/or improvement ideas are absolutely welcome below.
