Questions? E-mail me: shack@tomochka.com
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Inspired
by Budd's homebrew buddipole and AK0M's big 40M coil, I set off to fashion
my own version. I guess I had one overriding goal: make it as cheap as
possible!
Well, I succeeded in making this version for 12 bux and a few junk drawer parts and to my surprise it worked first time! One way I saved $ and space was to use vertical wire tails instead of the telescoping ends. |
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Here
is my version of AK0M's 40M tapped coil. These are, of course, what took
up 90% of the manufacture and assembly time for an otherwise very simple
design.
The coils are single integral units with the 1/2" PVC running through it and some ABS 1-1/2" breakouts for bushings. Since I had some scrap 1-1/2" PVC already I dug out my Handbook and modified the winding to match AK0M's coil. I found it relatively easy to find taps to tune new bands. It should be easy to mark them for later reference. |
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One
of my goals was NOT to make something that I would walk around with, I was
after more of a campground antenna for my K1. Thus, I didn't bother to
make a second joint in the arms and the arms are longer overall than
Budd's original design. Adding another joint would be trivial however.
I used a cross joint in the center so that I could add more pipe on top for different mounting situations. Each dipole leg terminates in a ring connector and is bolted to the arm. The bolts extend for attaching a balun (glad I had a spare handy). |
