Step 10: Tophat NAROD Holder

I designed my antenna with a straight NAROD, but built in provision for trying out the several shapes and sizes of tophat NARODs. The photo shows how a 90-degree standard elbow can be drilled through to make an adjustable holder. It can be slid up and down and back and forth, then cemented in place to accommodate any tophat. A modified pipe cap confines the tophat, simulated in the photo by a short length of copper tubing.
All these designs are in the public domain and free to use. They are not patented.
Great job.
&quot;which is offered free for private use, but commercial exploitation is prohibited.&quot;<br><br>The GPL allows anyone to copy, use and re-publish the DBGH_VHF_hi_Antenna.pdf illustration be they private use or commercial exploitation. GPL prevents limitations on who can copy the file. That's the price of using GPL.<br><br>Of course, private and commercial folks are also free to use the Hoverman design (patent expired) or the Gray-Hoverman (never patented and published for more than a year). The GPL has nothing to do with this since Ideas, procedures, methods, systems, processes, concepts, principles, discoveries, or devices (as distinguished from a description, explanation, or illustration) cannot be copyrighted.<br><br>Ignore those trying to use the GPL to regulate design concepts.
PVC fittings need to be drilled in precise locations. I agree with this statement. Please check idccorp.com for more information about PVC Fittings.
You can check your local home improvement store like menards or home depot and save shipping charges, instead of looking for these common items on the web.

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