I'm getting ready to put up a TH-11. Do you have any pictures of what you
are describing? My TH-11 is all hose clamps and I don't want to take this
thing back down after a couple of years to replace an element that feel
apart.
Thanks
On Thu, Aug 13, 2015 at 7:17 PM, Stan Stockton <wa5rtg@gmail.com> wrote:
> See below.
>
> Stan
>
> Sent from Stan's IPhone
>
>
>
> > On Aug 13, 2015, at 10:21 AM, Michael Tope <W4EF@ca.rr.com> wrote:
> >
> > Stan,
> >
> > A couple of questions:
> >
> > 1) Does the counterbore go all the way through the one wall of the outer
> diameter piece?
>
> Yes
> >
> > 2) Is the clearance between the counterbore diameter and the cap screw
> head diameter critical?
>
> Not very critical but you don't want a huge hole for the head of a #8
> socket head cap screw. Just enough so it passes by the OD on the side
> where you insert it. The drill bits do a perfect job.
> >
> > Thanks,
> >
> > Mike W4EF................
> >
> >> On 8/13/2015 6:53 AM, Stan Stockton wrote:
> >> After about 40 years of making my own antennas I learned something a
> few years ago when faced with assembling 65 tribanders (520 elements) we
> made for WRTC2014.
> >>
> >> I was introduced to the element joint attachment method I am told is
> used by Optibeam. I was skeptical when I heard the verbal description,
> having settled on pop rivets after every other conceivable method about 20
> years ago.
> >>
> >> I made one element with pop rivets and another with a single stainless
> steel socket head cap screw with a counterbore (head clearance on socket
> head screw) for one wall of the larger diameter tubing for each joint, then
> grabbed each one in the center and violently shook them back and forth.
> The one with SHCS joints felt like one solid piece of tubing as compared to
> the pop riveted one.
> >>
> >> It is so easy and so solid, I will never mess with pop rivets again.
> >>
> >> A V block fixture with stops, drill press and some of these bits along
> with straight bits for the smaller diameter tube drilling are all that is
> needed.
> >>
> >> http://www.wttool.com/index/page/category/category_id/14686/
> >>
> >> make the job easy in comparison to many methods. The counterbore is
> important. Use stainless nylock nuts.
> >>
> >> YMMV but I'm sold on it.
> >>
> >> 73...Stan, K5GO
> >>
> >> Sent from Stan's IPhone
> >
> > _______________________________________________
> >
> >
> >
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--
-----------------------------------------------
*Michael Murphy - KI8R*
mike@ki8r.com
www.ki8r.com
*614-371-8265 (cell)*
-----------------------------------------------
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