73 vertical antenna book

I, claude jollet, am the author of the ebooks and paperback book advertised on this page. It may be usable on higher frequency bands with an antenna tuner, though it could be hard to tune on exact even harmonics in the 14mhz and 28mhz bands because exact 12 wave verticals have very high impedance. Vertical antenna mounting height audio systems group. A typical 43foot vertical vertical presents the following 50ohm swr curve. Marconi or groundplane vertical antenna the quarterwavelength vertical antenna, also called a marconi antenna is widely used. Build this novice fourband vertical basic amateur radio. Designing a vertical antenna graphs cut through the mathematical headaches of antenna design. A 43 foot vertical with ground radials could be an excellent 14 wave vertical antenna for 7mhz40m. The arrl antenna book has a short section on linear loading. I now believe it is the best of the orrcowan handbooks recommended must have resource for the fcc amateur radio operator. The antennas described in this book, except for site and propaga tion conditions. Vertical antennas are able to operate particularly well in many instances. As required by the ftc, i declare that i earn a portion of the retail price every time you buy a copy after clicking on a link on. Clerks in radio stores told me that this book was outselling other titles 2.

One way to cut costs is to keep the antenna simple. My antenna s name probably reflects the fact that its design is derived from a military model. You can do the same and use the world as your testing. It was known for its strong emphasis on technical articles and for the lengthy editorials in each issue by its founder and publisher, wayne. By walter schulz, k30qf ere is a vertical designed and built from graphs contained in the arrl antenna book and arrl electronics data book. Comet gp3 dualband vhfuhf base vertical antennas gp 3. These antennas are constructed of rugged tapered fiberglass, providing an insulated antenna for the safety of your. The contents of this book on hf antenna basics are mostly aimed at the amateur radio beginner and aspiring ones. Vertical antennas vertical aerial types electronics notes. These antennas are constructed of rugged tapered fiberglass, providing an insulated antenna. The antenna known as the a99 and sold under the brand of solarcon or antron works well on 10 meters, and i have been told it will tune to 6 as well. Understanding antennas for the nontechnical ham by n4ja an.

Simple, effective, reliable, serviceable, small footprint, halfwave, no radials needed, 7 hf bands plus 6m undocumented but checks out with my mfj analyzer what more could you ask for in a vertical antenna. Therefore, this book provides answers to basic questions like. I thought i would share a few of my notes on tuning up a 6btv antenna, and constructing a radial field. This calculator is designed to give the vertical length height of a particular antenna, for the frequency and wavelength chosen. What is the best hf antenna for my needs and location. In 1973 while we were working for radio station wwnc in asheville, north. Uarc maintains a library of donated books about amateur radio. The type of matching circuit used here is described at some length in chapter 7 of the 18th edition of the arrl antenna book. Designed with 6063 corrosionresistant aluminum tubing and stainless steel hardware, this antenna is very durable and attractive. A breakthrough in a full size quarterwave highperformance antenna. The third reason is a desire to teach basic antenna theory to the average ham. The results are consistent with the above equation for su.

The antenna is resonant and a good match for 50ohm cable. Excellent resource and research book for vertical antennas. The success of the three previous editions of practical antenna handbook has. So here is the model for the k8ch antenna, modified and scaled for 20m. The type of matching circuit used here is described at some length in chapter 7 of the 18th edition of the arrl antenna book 1997 on page 712. Short verticals, while providing construction simplicity and space advantages, can present electrical problems. The antenna wire frame and its elevation pattern are shown in figure 1. Some hams use vertical antennas on this band to work distant stations dx. We hope to help his contributions in the ham antenna field to live on by presenting in edited form, one of his many projects taken from the book. Neither will i recommend one to others without being able to show the theoretical performance in a computer model. Not for the beginning fcc licensed amateur radio operator.

A vertical hf antenna can get away with a height of only. The marconi antenna is half the length of a dipole antenna. Putting your first amateur station together can be an expensive proposition. I also found a design for a linear loaded vertical antenna for 40m and 80m. The problem with the early windom was the single vertical wire feeder was first, not the best feedpoint impedance, and second, the trick with the. One obvious answer is that a vertical antenna can be made to work in a very small area. Chapters cover theory and modeling, vhf and uhf, hf, directional arrays, reduced size, and radials and ground systems. The original windom offset singlewirefed antenna goes back to the early days of ham radio. Using a 4 square vertical phased array to improve your. Sticking to the age old formula of a half wave wire 468 fmhz you will get 66. The opinions expressed in this book are those of the author and not necessarily those.

This does not take into consideration the type or size of horizontal reflectors, of even if there is a need for t. Comet gp3 dualband vhfuhf base vertical antennas gp3. He told me that the reason why he selected my book over others was. You can see that when erected in a straight line the dipole is quite.

Fig 973swr curves for 80 and 160 meters for the different antenna configurations of fig 971. It has the advantage that it does not require any radials, but does require to be a minimum of a half wavelength long. Louis vertical is described in the september 1996 edition of qrpp journal of the northern california qrp club on page 61. Members are welcome to check out any item for a maximum of 30 days. The ground or ground plane is considered to be a conductive surface which works as a reflector see effect of ground. It is not recommended to mount is antenna on the roof of your house. Heres how i shaved the price and provided fourband operation. Yes, well, we have to put 67 feet of wire somewhere, so lets extend the wire by pulling more wire out of the chalk line reel and over the top of the pole, make a shape that is really easy to deploy, resembling a shark fin, just be sure that the far end is up at least 3 to 4 feet up off the ground. Either i gave it to someone and it wasnt returned or i just misplaced it. What type of standalone antenna tuner should i use and which should i avoid. These ebooks on hf antenna basics, described on this page, are intentionally light on theory and heavy on practicalities. If you are interested in how vertical, beam and triangle antennas work, the theory, efficiency, and fundamentals, this is the book for you. The vertical, marconi, or monopole antenna is a singleelement antenna usually fed at the bottom with the shield side of its unbalanced transmission line connected to ground.

An 80meter vertical helix simple ham radio antennas. Antenna books of interest to qrp enthusiasts version 1. The vertical dipole is used in some instances to provide a robust form of vertical antenna. At 40 feet the halfsquare is really mangled, with only 35 foot high. From my initial research in various arrl publications, i discovered that a halfwavelength of wire for a chosen frequency wound in a helix on an insulating form such as a wooden pole, a fiberglass pole, or even pvc pipe could duplicate the performance of a. Many of the antennas described in this book compete with, and. Using the halfsquare antenna for lowband dxing by rudy severns, n6lf 32857 fox lane. The quarterwavelength vertical antenna, also called a marconi antenna is widely used. The comparison between this antenna and a dipole of the same height is shown in fig 4. A compilation of the best articles from arrl publications on the art and science of the vertical antenna.

The 43foot vertical has become the new standard of vertical antenna heights. Zerofiveantennas multiband groundplane vertical antenna installation tips manual this manual is for the 1080 meter freestanding ground plane vertical antenna. What is the attraction of vertical antennas for hf. From my initial research in various arrl publications, i discovered that a halfwavelength of wire for a chosen frequency wound in a helix on an insulating form such as a wooden pole, a fiberglass pole, or even pvc pipe could duplicate the performance of a standard 14 wavelength vertical antenna.

Albeit not a book, this complete collection of back issues of the extremely popular ham radio magazine beholds a vault of very well written, timeless antenna articles that will make you better understand current antenna design trends. You can see that when erected in a straight line the dipole is quite directional. It was with surprise and delight that i noted that clerks in one radio. They confirmed that the types of people who buy the book meet the profile above. Use the s9v18 for 20 through 6meters, the s9v31 for 40 through 6meters, and the s9v43 for 80 through 6meters. The 1080 meter ground plane is a huge antenna weighing 29 lbs. My antennas name probably reflects the fact that its design is derived from a military model. Each antenna described in this book was constructed by the author without assistance. The success of the three previous editions of practical antenna handbook has been most gratifying.

Although it was fed offset, the early hams called it a t match. Ldg electronics s9v series vertical antennas s9v31 free. What i dont like about the quarterwave hf vertical antenna, as its typically installed for home base use is that. But when erected as an invertedv you gain a couple of spoints 10 12db in the. It is similar in operation to a vertically mounted dipole antenna. Advanced antenna theory 1952 schelkunoff radio telephony for amateurs 1922 ballantine 73 vertical, beam and triangle antennas 1970 e. Advantages the elevated radials greatly reduce ground losses when compared to a groundmounted vertical antenna. Comet gp3 dualband vhfuhf base vertical antennas provide very good gain on the 2meter and 70centimeter bands. On4uns lowband dxing, refers to many of these articles. Ldg electronics s9v series vertical antennas are tough, yet ultralightweight, nonresonant vertical antennas designed for amateur radio use from 80 through 6 meters. It says that linear loading is a little understood alternative to inductive loading that can be applied to almost any type of antenna.

Antennas antennas couple propagating electromagnetic waves to and from circuits and devices, typically using wires treated in section 3. This final version, and tomorrows talk about 43 ft verticals will be on my. Ed built, tested and used every one of the 73 antennas in the book. Over average ground the halfsquare is superior below 32 and at 15 is almost 5 db better. The model i rarely build any hf antenna unless i model it first.

The center radiation resistance of a conical antenna is much higher than the 73. A handy antenna products suppliers list is included. Put them to work and build a vertical that will shake the air with energy. Theory tells us that this should by experimental results which show the tradeoffs be possible, but the. Orrs most popular book is all about cubical quad antennas. The significance of a perfect match becomes more pronounced only at vhf and higher, where feedline losses are a major factor. This fiveband loftmounted antenna has been used at two locations with great results.