4 elements yagi antenna
![4 elements yagi antenna 4 elements yagi antenna](https://consumer.steppir.com/wp-content/uploads/2018/12/4E-40-30-300x300.png)
If you decide to go with 1/4″ round please note that the dimensions and calculations you see in this article will NOT work using 1/4″ rod because 3/8″ rod has more surface area for the signal to travel on and all the calculations are made with 3/8″ In mind. You can also use 1/4″ solid round aluminum instead of the 3/8″ to save a couple of dollars but realize that it’s easier to damage 1/4″ rod. For the antenna that we’re building we will be using 3/8″ (.375″/9.5mm) round solid aluminum and 1″ (1.00″/25.4mm) square tubing to mount the elements to. Since we’re dealing with smaller VHF/UHF antennas, the material doesn’t have to be large. For HF Yagis, you’re going to need Tubing ranging from 2″, telescoping in diameter down to 1/2″ because the antenna is going to be big and will need to support the weight of the elements. What’s next? Now we need to figure the sizes of the material we’re going to use.
![4 elements yagi antenna 4 elements yagi antenna](https://jkantennas.com/images/jk204.jpg)
If it comes to other designs of yagis that use a Hairpin or folded dipole then I would take the type of aluminum into consideration. Since we’re not bending anything on the yagi we’re building then It won’t matter.
![4 elements yagi antenna 4 elements yagi antenna](https://handiko.github.io/Yagi-4E-144/4nec2-calc.png)
#4 elements yagi antenna crack
6061-T6 tends to crack when bending using a tight radius. The downside of 6061-T6 is when it comes to bending. The reason is that 6061-T6 is more weather durable and easier to work with compared to other aluminums. There are many different types of aluminum and I would say that 6061-T6 Aluminum would be the best choice for antenna building. Most Yagi antennas are built using Aluminum since it’s light and is a great conductor (Well, compared to steel/stainless). To start off your going to have to know what material your going to be using. On the Yagi that I am building, the design is based on the length of the (boom) antenna rather than the gain. Increasing the length (boom) and adding more director elements will increase the gain/efficiency of the antenna. The length of the antenna will vary depending on how much efficiency/gain you want. The higher the frequency, the smaller at antenna. The lower the frequency, the larger the antenna. Yagi’s come in many different sizes depending on the frequency and the efficiency of the antenna. However the Yagi I’m building does not take much space and could be transported to be used in events where I am portable. Those factors could be age, housing restrictions, living in an apartment, permits, handicap, property size, neighbors, and more stuff than I list. There are also several other factors that would steer someone away from a Yagi. I’ve seen cases where someone moved or is SK (Passed on) and sold their equipment cheap. HF Yagis are expensive and so is the tower and rotor, so the parts alone could add up to couple thousand dollars.
#4 elements yagi antenna install
In order to use a Yagi/Beam to it’s fullest you would have to install an antenna tower/mast and rotor. Well then how come every ham doesn’t have a Yagi (on HF)? There is a couple of down sides to having a Yagi or Beam antenna (on HF). On the lower frequencies (HF), a Yagi would be the antenna of choice by Hams. Whereas a Vertical (Omni-Directional) radiates its energy in a 360 degree pattern (think of throwing a rock in a still lake and watch the ripple pattern in the water.) which will send out your signal “everywhere” but will dissipate quicker. In the radio world this is a great because you can basically “Focus” the power and direct it in the direction you want. When cut and placed at a calculated distance (On a Boom), the elements will cause the RF (Power) to be sent (radiated) or received in whichever direction the antenna is pointing to. The 3 Major parts which make a yagi are the driven element, reflector and director. A Yagi is a Directional antenna made of up elements. In order to design a Yagi we have to learn what a Yagi is. So please excuse if I go into details about things that you consider simple and “common sense”. I am writing this article in a way in which I hope newer hams can understand, build and learn about antennas. I’ve taken what I learned from the GMRS Yagi and applying it to the design and fabrication of this VHF Antenna. Now it’s time to step it up (just a little bit) and fabricate a bigger antenna.ĭue to material, I decided on a 5 element Yagi built for VHF since all I would have to buy is more 3/8″ round stock.