Guide to Buying Antennas for Ham Radios

Your Guide to Buying Antennas for Ham Radios

The Federal Communications Commission (FCC) approves the licenses that grant amatuer radio enthusiasts the legal authority to transmit radio waves for personal use. Non-commercial applications of amatuer radio wave transmission include: organization during emergencies and providing communication channels for people to interact throughout the world. The origination of the term "ham" has been lost over the years, but many amatuer radio enthusiasts believe the term refers to amatuer. While ham radios have advanced technologically, especially since the 1980s, a ham radio’s quality is largely determined by what type of antenna an operator uses to transmit and receive radio signals.

History of Ham Radios

The birth of ham radio is associated with the experimentation performed by inventors at the turn of the 20th century. After the Titanic sank in 1912, the United States Congress passed a law that restricted radio wavelengths to shorter than 200 meters, thus rendering radio transmissions ineffective. The number of amatuer radio enthusiasts in America was estimated to have declined by 88 percent. After new laws loosened the restrictions, the number of ham radio operators began to rise, only to fall again during both World Wars. Amatuer radio operators contributed to the development of automated message systems and packet radio transmissions, which allowed the hobby to become a practical way for people to communicate during and after disasters. In 2006, the FCC eliminated Morse code testing requirements for all American amatuer radio license applicants, which once again increased the number of amatuer radio enthuisasts.

Licensing

Before ham radio operators can begin to configure ham radio antennas, they must become licensed in the country where they operate. Ham radio operators are required to prove their knowledge of key concepts and they must completely understand the laws that apply to ham radio operators. The key concepts and laws vary by country. One of the most important aspects of licensing is to ensure operators understand the regulations that apply in their country of operation. Passing an examination typically qualifies someone to become a licensed ham radio operator, but some governments recognize professional or academic qualifications. For instance, in some countries, someone who has earned an electrical engineering degree may be able to bypass taking an examination. Some countries offer progressive examinations, which allow ham radio operators to attain licenses. Licensed ham radio operators have the requisite knowledge to buy the type of ham radio antenna that meets their geographic parameters and transmission objectives.

Factors for Choosing a Ham Radio Antenna

Choosing a ham radio antenna depends on five factors. The weight given to each factor ultimately determines what antenna an operator may purchase.

Cost


Operating a ham radio can be an expensive proposition, from paying for licensing examinations to purchasing a ham radio. However, purchasing the antenna is where operators feel the greatest financial pinch. Operators have to decide whether to invest in a commercially made ham radio antenna or buy the parts to build their own antenna. Either way, cost plays a huge role in determining what type of antenna an operator buys.

Space

Horizontal ham radio antennas work best in open spaces, mostly in rural areas where there is less radio frequency interference. Vertical ham radio antennas allow operators to rise above the frequency clutter of other devices.

Durability

Ham radio antennas must be able to withstand weather elements. Ice, wind, lightning, and intense heat can negatively affect a ham radio antenna’s lifespan. Operators who live in areas that experience extreme weather conditions may want to place durability at the top of their ham radio antenna criteria lists.

Performance

Ham radio operators have to decide if they want to transmit and receive radio signals from all over the world or just from neighboring counties. They must determine how much interference they are willing to tolerate. Security is an important aspect of performance, since crowded frequencies can allow someone to eavesdrop on conversations.

Government Regulations

The United States federal government has increased its regulation of ham radio operators. The FCC issues new regulations on the heels of bills passed by Congress. All ham radio operators must abide by federal laws, but local ordinances and regulations often determine what type of antenna an operator buys. However, conflicting zoning laws may require some ham radio operators to seek clarification from their local governments.

How a Ham Radio Antenna Works

Ham radio antennas represent the first step of receiving incoming messages and the last step of sending outgoing messages. Electricity is the primary energy source for powering ham radio antennas via the charging of alternate currents. The ham radio transmitter changes energy flow to create a signal that passes through a ham radio antenna. Ham radio antennas convert the alternating current carrying the signal to an electromagnetic wave that moves around in space. Incoming electromagnetic waves are intercepted by a ham radio antenna, which then changes the waves into a demodulated signal that the radio receiver accepts. Ham radio antennas influence many ham radio attributes, including range, clarity, and security.

Types of Ham Radio Antennas

The type of antenna that a ham radio operator uses is the most important factor in determining the quality of ham radio signal transmission and reception. Ham radio antennas serve different purposes, primarily based on the location of users.

Vertical

Practicality makes the vertical ham radio antenna a perfect match for residents of urban areas. This antenna saves space, while providing operators with many of the same benefits experienced by operators who transmit and receive radio signals through a horizontal ham radio antenna. A quarter wave vertical antenna possesses vertical transmitting elements that attach at the bottom of the antenna to simulate the ground. The length of these elements should be about one-fourth of the desired electromagnetic wavelength. Vertical ham radio antennas work especially well for operators who live in large apartments or condominium complexes.

Dipole

Dipole ham radio antennas are more common in large, open areas. It is the easiest antenna to build and the simplest ham radio antenna to maintain. Two wires connect to a balun in the center of the antenna. The size of each wire should be about half of the desired wavelength. Baluns connect a balance line with an unbalanced line, which connect to a ham radio’s transreceiver. This horizontally constructed antenna can also adapt to more confined areas by connecting more than one band to the same balun..

Reflector

Reflector antennas consist of two or more elements. RF signals feed into one element, which is called the driven element. The signal creates RF energy in another element called the reflector. Radio signals then reflect back and forth. Multiple elements placed in front of the driven element coordinate the radio signals to the ham radio receiver. The popular Yagi antennas use reflector antenna technology.

Other ham radio antennas include a loop antenna, which transmits and receives radio wavelengths in elements that form a loop. Some amatuer ham radio enthusiasts like to use dish, mobile, or microwave antennas for ham radio signal transmissions. These types of antennas require operators to take more of a hands-on role by manipulating electrical current length, which reduces the efficiency of ham radio performance. However, electrical current manipulation antennas are a cheaper way to become a ham radio operator.

Where to Find Ham Radio Antennas

Beginners should consider buying already constructed ham radio antennas from a regional or national electronics chain store. Do-it-yourself ham radio operators can find parts at smaller electronics stores. The advantage of buying already built antennas is that the installation process requires less expertise and any expertise needed can be provided by store staff members who have received extensive training on ham radio antenna products. Consumers may find ham radio antennas sold by online stores or online classified listings, but the best bet for buying online is the leading online auction site, eBay.

Buying a Ham Radio Antenna on eBay

While beginners should shop for their ham radio antennas in person, those who have the technical acumen and experience operating ham radios can find what they need on eBay. The leading auction website offers a powerful search engine that allows users to find constructed ham radio antennas or parts that enhance the performance of their antennas. Simply input a few keywords and eBay takes you to the seller pages. It is here that you can peruse the selection of antennas and parts. Each seller provides a photo of the product he or she wants to sell, along with information about when the auction is held, return policies, and shipping times. The more specific keywords that you input into the search engine, the quicker you may find the ham radio antenna that matches your needs.

Try to purchase a newer ham radio antenna model. Sellers make newer antennas available for a number of reasons, but the primary reason is that the antenna they bought violates local municipal codes. Most sellers discount newer models, which is another reason to consider newer antennas. eBay awards the Top-Rated Seller designation to sellers that establish a record of running fair auctions and offering high-quality products. You can also review customer feedback on every seller’s product page.

Conclusion

Ham radio antennas comprise the most important component of a ham radio. Operators have many factors to consider before purchasing a ham radio antenna, such as cost, durability, performance requirements, spac, and government regulations. Ham radio operators have three primary types of antennas from which to choose, and they can reconfigure them to meet their radio transmission and reception needs. What was once considered a hobby has transformed into a viable communication tool during emergencies. There have been recorded instances when cellular coverage has failed, but ham radio operators were still able to communicate status reports and instructions on how to deal with natural disasters.

The changing role of ham radio operators and the advancement of technology means that the design and construction of ham radio antennas should continue to evolve. Despite periods of waning popularity, ham radio has become a popular hobby for aficionados throughout the world. Just the ability to speak with someone who lives 5,000 miles away is an alluring aspect of owning a ham radio.

http://www.ebay.com/gds/Your-Guide-to-Buying-Antennas-for-Ham-Radios-/10000000177628905/g.html

.