In the end, all the pen markings should line up with each other. Drill holes whose size matches the hot glue sticks standoffs diameter. In this case, a 1. Drill only one face of the square boom, that is, the face which will receive the standoff. The hot glue stick standoffs are cut 0. Remember to include in your calculations the part of the stick that is inserted inside the boom. For my antenna, the total length was 3. The slot depth is calculated in order to maintain the wire coil centered with reference to the square boom.
In this case a coil radius of 2. The easiest way to create the slots is to use a heated piece of 12 AWG wire and to force it against the standoff tip. This will melt the tip down to the required slot depth. The standoff tip slots must be oriented with an angle of 12 degrees with the antenna reflector.
This will accomodate the wire coil and preserve its shape. You can apply some hot glue at the standoff extremeties. This will hold the wire in place. You can paint the antenna parts that are more susceptible to deterioration: the hot glue standoffs, the copper wire and matching plate.
There can be an awful lot of facts that adheres to that take into consideration. That may be a pleasant point to generate in place. Presented the thoughts over as common motivation nevertheless clearly you will discover thoughts like the 1 you actually produce upwards where a very powerful element can be getting work done in honest beneficial faith. I wear? How can I support my 10 foot 15 cm helical made around a PVC pipe and to be fixed on a metal pipe mast 3 inches in diameter.
I think that anything metalic put in say centre of the boom will interfere and affect the antenna gain. Please reply soon. Pretty nice post. I just stumbled upon your blog and wished to say that I have really enjoyed browsing your blog posts. In any case I will be subscribing to your rss feed and I hope you write again soon!
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You are commenting using your Twitter account. You are commenting using your Facebook account. Notify me of new comments via email. Notify me of new posts via email. Build WiFi Antenna Blog Stats 46, hits Uncategorized. Helical Antennas Basic Information The Helical antenna is a simple way of obtaining high-gain and a broad band of frequency characteristics. Abstract The helix antenna, invented in the late fourties by John Kraus W8JK , can be considered as the genious ultimate simplicity as far as antenna design is concerned.
Theory in a birds eye view The helix antenna can be considered as a spring with N turns with a reflector. Here are a few additional notes to consider: Using a felt tip pen, mark the wire at every Share this: Twitter Facebook. Like this: Like Loading Sac Hermes said. Beats By Dre said. Azam said. Zem said. Win an iPad 64GB said. Microwave said. We have written this article to make the complex task of choosing the correct antenna for your system much easier and also to let you know how the different types of antennas perform.
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