What is a Ham Radio Antenna?
A ham radio antenna is the component that the radio waves are transmitted away from and towards when dealing with a ham radio. In essence, the antenna is the connection between one amateur radio user and another. What is important to determine, though, is what kind of antenna to get. There are a few different types of antennae out there, so picking the right one can be a bit daunting, especially to someone who is just becoming a ham. Furthermore, there is information about each one that is important and adds to the decision making process. Finally, setting up each one requires its own particular process.
Wire Antennas
With wire antennas, it is important to place it in an area that is free of interference such as phone lines or electric wires. The higher they are placed, the more effective it will be. Before setting it up, it is important to make a decision between operating with a dipole, an inverted vee or a long wire. Furthermore, make the decision over whether the antenna will be fed with open wire, ladder line, or coaxial cable.
Once all the decisions have been made, the following steps can be done to set it up right:
- Secure weatherproof entrance for the line that leads to the radio room.
- Measure out wire for lowest frequency. To do this, divide 234 by the frequency. This determines the length of one leg of the antenna in feet. The unit should be megahertz.
- Trim the wire appropriately.
- Attach the trimmed wire to the center insulator.
- Adjust proper resonance. To do this, use a SWR meter.
Beam Antennas
Beam antennas are always a great way to go, but they are a lot heavier than a simple wire antenna and therefore can be dangerous. Check the manufacturer’s gain rating and then double check it online with other reviews to make sure that the information is true. It is important to consider building a tower to support the large beam antenna, but if this is the desired action, it is important to make sure that building it follows all government zoning information. Finally, look into the wind resistance for the tower to ensure it doesn’t fall over. That would be a bad outcome for a new ham.
Vertical Antennas
If there is limited space, choosing a ground-mounted vertical antenna is a good idea. Because a vertical antenna is the radiating element, it needs a counterpoise built for it. Finding the right area for all of this can sometimes be difficult. It is important that there is enough space for a set of wire radials to be laid out so that they can act as the counterpoise.
Mounting it can sometimes be a tough decision. Where to put it can help determine the best way for it to get the proper transmission. It is often suggested to mount it on a deck rail or the support post for a chain-link fence.
Helpful Tips with a Ham Radio Antenna
- The higher the antenna, the better it will do.
- Keep it away from objects. If there is interference, it will prevent some transmission.
- If there is a television antenna nearby, install the proper filter to ensure it doesn’t interfere with the radio transmission.
- Seal the joints and connection with silicone. This prevents against corrosion and loss of connectivity.
Doing ham radio is a great thing, but choosing the proper ham radio antenna can be tough. In the end, it comes down to preference and money available for the project. Just remember the previous tips and it will definitely help with making the project work out great.
