The arrow website has drawings that are detailed enough to use for construction drawings. However you might look online for J-Pole antenna calculators to help point you in the right direction. I recall that they have drawings for a ground plane as well and it has to vertical elements. I don't know if spacing is critical on a ground plane. Maybe you could drill and thread the top ends of the vertical elements and use long screws for length adjustment?
Now that is a dang good idea! Thank you! i just happen to know a couple of fellows that have a lathe and mill in their garages. Bet i can get it drilled/bored for a six pack. Three #10 machine screws and jam nuts, stainlesss of course. This could be fun and interesting......
Just thinking and typeing....about building an osj with half inch rod (3/8 is usual/standard). Looking for more bandwidth.
Fact, spacing of the rods is important. So, to maintain the same spacing, the middle hole (short element) should be 1/8" to the right of the #1/ hole (driven element) then the third hole should be 1/8" further from the second hole..... that should maintain the same spacing. But, really, just how critical is the spacing? When assembled, the elements are not perfectly straight, the spacing, at the tips, is varied from antenna to antenna. Hmm... questions questions, try not to over or under think this. Maybe holes 2 and 3 should be slotted? I think I'm going to need one of them fancy gagets that tells you what the antenna is good for....what is it called, analyzer?
Okay, that is enough rambling for one post. I am getting curious and a little interested/excited. Think I'll wonder up to my shop, aka, redneck headquarters, and let the tinkering begin....
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