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VK5ZVS |
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| Projects 'n' Stuff |
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| Home | Back |
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| Using tent poles to get a bit of height! |
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| We all know that an easy way to set up some temporary antennas is to use the extendable aluminium tent poles that are available at most camping stores.
Did you also know, that you could also use two of them to not only get some additional height, but you also can make it rotatable - via the armstrong method, of course!
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| You can make them from anything, really. As long as they are weatherproof and withstand the loading at the top!
I made mine from two pieces of scrap plywood - soaked with supa-glue! I didn't have any varnish - so that had to do!! Hi !!!
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| During the holiday break, I finally got to paint those plates with some marine grade varnish.
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| It would make sense to have two poles of the same type - else, drilling the right hole combinations
could get tricky. My poles were the same. so, I just needed to clamp the two pieces together for drilling.
I was lucky and had the right drill bit for the smaller hole and a holesaw for the larger diameter tubing. Just allow for a small physical
separation between the two poles when assembled. See pix above.
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| This pic shows the "bottom" plate and the two poles. The plate sits on the plastic clamp assembly
of the lower pole while the spike of the upper pole goes through the plate from the top.
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| This pic shows the "top" plate and the two poles. This time, the plate sits on the spike
of the lower pole while the plate sits under the clamp assembly of the upper pole. (mmm ... did I get that right ?) In case you hadn't noticed
- or, I failed to mention, that, the one pole needs to be inverted to the other, for this kind of assembly to work.
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This pic shows the top load. Probably a bit much - but - it is only temporary, right?
What I've got mounted up there is - a dual 2metre/70cm j-pole right up top; followed by a 5 element 2 metre ZL Special and then an 18 element
Parabeam for 70cms. And, yes, it does swing - er - rotate quite easily.
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