I had chosen the gh10n3 version of the gray hoverman. It is designed for the uhf region, but above channel 54, the gain drops significantly. Jul 26, 2017 hoverman antenna, built from pvc, wire mesh, and some bare copper wire. Air tv channels transmit on frequencies ranging from. This is a easy tv antenna to build picks up vhf and uhf. This link is listed in our web site directory since wednesday sep 19 2012, and till today cantenna calculator has been followed for a total of 4084 times. The results are conveniently displayed in inches, centimeters, feet and meters.
About cantenna calculator the resource is currently listed in in 2 categories. Back to the hoverman, a single bay antenna consists of a single elemental pairing, where a dual bay consists of two sets of elements joined together to increase gain. The grayhoverman antenna for uhf television reception. The reasons were better gain and its dual band nature, uhf and vhf band iii. Since crowdfunding is a bit of a gamble, it is always kind of hard to determine just how to write about these projects, considering that many of them may not ever deliver.
This formula to obtain the length of a halfwave dipole antenna will give a good ballpark value to start with. Since wineaard actually controls the antennas production, it may not be available from any other source except radio shack, as it is not currently a popular antenna design. The following two graphs show the performance of the hoverman screen antenna at three uhf frequencies representing the almost the entire range of todays uhf tv band channels 14 51. The gray hoverman antenna construction for meteor observation z. Below is a link to the one i built, and it is much simpler than the others i have seen and a lot cheaper to build. It is the best receiving dipole, because it has the greatest bandwidth. Tags antenna, calculator, download, electronic software, rf post navigation. Viezbicke thisreportpresentsdata,usingmodelingtechniques,fortheoptimumdesign. This antenna is recommended when fm receiver has 300. L is the loop inductance in mh a is the length of one side of the loop in cm b is the loop depth thickness in cm n is the number of turns i have taken the joe carr formula and created a javascript calculator for square loop antennas. John e davis has several antennas based on gray hoverman. The feed point is usually placed at the centre of the dipole, for although this is not absolutely necessary, it can help prevent. I found this impedance calculator for proper phase line separation.
The antenna can be located outside, or inside the home. A very basic program for calculating the length of each leg of a 12 wave wire dipole antenna. Doug vk3um was a friend from our days at unley high school during the mid 1950s, a common interest was that of radio and electronics leading to our introduction to ham radio through the 288mhz band now no longer part of australian allocations. How to make a grayhoverman uhf antenna know about life. Im in a deep fringe area and my channel master 4228 with cm7777 preamp signal is scattered at best especially when the leaves are on the trees. Very good antenna for both analogue tv and dtv, especially dtv as it outperforms cheap yagis, log, panel and other commercial antennas. Antennas are equipped with radio transmitters and receivers. Grayhoverman antennas original hoverman variations, incl antennacraft g1483 and radioshack 151627, sbgh single bay grayhoverman and dbgh double bay grayhoverman analyzed for hivhf and uhf performance using 4nec2. Antenna length calculator build a dipole inside antenna and receive all the fm stations on your. Grayhoverman, the wideband tv antenna air tv channels transmit on frequencies ranging from 170 mhz to 860 mhz. Antenna calculator length of the dipole antenna calculation. Download hf dipole calculator 12 wave wire dipole antenna. Jan 22, 2015 i recently designed and built a homemade antenna for tv reception. The grayhoverman antenna for uhf television reception march 11, 2008 updated march 22, 2008 corrected sbgh performance plots this project is dedicated to doyt r.
Lets examine the antenna in a test setting showing the real azimuth and elevation patterns. I have avoided replicating gh results found elsewhere. It does look like the one in the picture is over engineered, but it would last for years if erected outdoors. Program good for 1 500 mhz, although intended for mf hf. Calculator fm antenna length calculator fm frequency modulated antenna to bring in the stations loud and clear.
The antenna calculator above uses this formula as a starting point to calculate wire lengths for the dipole. The grayhoverman homebuilt tv antenna can be assembled from common plastic plumbing pipe and fittings. Spacing is the distance from the boom to the gammamatch. Only recently that i had the time to construct an antenna again. Hoverman and was invented in the 1950s covers from 300 to 3000 mhz and shows high performance for most digital hd channels broadcasting. Nov 26, 2017 the design presented here is an alternative to a doublebay hoverman antenna. The gray hoverman design is based on the hoverman patents but we are waaaaay past that into a range of performance that beats any comparable commercial antenna the sbgh smokes the cm4221, the dbgh smokes the cm4228 and any other diy antenna project of similar requirements. If it is inside, just attach it to the wall where your receiver is located. John e davis has several antennas based on grayhoverman. So, im going to build the famous homemade hdtv antenna as seen here on youtube but i have a question regarding splitting a single antennas signal to 3 tv tuners.
The antenna is designed to be fed with 50 or 75 ohm coax cable of most any length with a balun. It has a very high gain but a much narrower bandwidth at its design frequency. The grayhoverman, if built properly, can outperform their equivalent commercial antenna and there are tests that support this. In the video instructions for building the antenna, the tvs coax plugs into is a standard 300ohm75ohm transformer. The grayhoverman antenna is well worth the effort to build. Gray hoverman, the wideband tv antenna air tv channels transmit on frequencies ranging from 170 mhz to 860 mhz. You can read more about the history of this design on their web page. Mar 11, 2008 the gray hoverman antenna for uhf television reception march 11, 2008 updated march 22, 2008 corrected sbgh performance plots this project is dedicated to doyt r. Resembling a giant insect or alien creature, the antenna eventually fell into obscurity. Hoverman type1 no reflector hoverman type 1 no reflector per us patent 2,918,672, issued 22dec1959, analyzed using 4nec2, assuming awg12. Gray hoverman hd antenna, ota before actually making it, id like to know if anyone else here has made one, or tried one out, any experiences or suggestions really, ive never worked with antennas, and i imagine that they can be tricky to get right. D is the distance between the centerline of each wire and r is the radius of the wire. The vhfhi band covers 175 to 230 mhz, while uhf covers 470 to 860 mhz.
Mar 05, 2015 lets examine the antenna in a test setting showing the real azimuth and elevation patterns. Jun 30, 2010 the gray hoverman antenna is well worth the effort to build. Here are some tips compiled from my build of a gh6 antenna having straight narods, but these hints can be useful no matter which of the many va. How to make a gray hoverman uhf antenna in the 1950s, doyt hoverman designed and patented a television antenna that was sold commercially throughout the next few decades. I live in the fringe area for reception, 44 miles from nyc and 51 miles from philadelphia, and with a decentsized commercial uhf antenna with preamp, i still couldnt reliably get digital channel 31 really uhf channel 26 from philadelphia. The hoverman antenna was invented in the 1950s by doyt hoverman before the advent of computer modeling, and appears to be a variation for uhf of the much earlier chireixmesny shortwave antenna. Feb 08, 2014 i found this impedance calculator for proper phase line separation. This link is listed in our web site directory since wednesday sep 19 2012, and till today cantenna calculator has been followed for a total of 4084 t.
The measurements below are for building a simple dipole antenna. With the impending digital switchover, many of you will find yourselves not only in. If you have no particular preference within a given ham radio band, then simply enter its center frequency i. This all came about to finally obtain offtheair ota signals for our tv. Design and adjustement is easy, as with the capacitor you can tune the resonance by some mhz with no effort. The antenna has 14dbi at its resonant frequency, and does. Dec 23, 2016 this is a easy tv antenna to build picks up vhf and uhf. Some sources say they have had better success using a gray hoverman homemade antenna. Pictured below is a schematic of the proposed antenna dubbed xgh8 along side the singlebay gh10 for comparison. Gh10 is a single bay gray hoverman gold standard data from j3d dbgh is a double bay gray hoverman data from 300ohm is for channel 51 antenna not designed for 52 and higher the announcement i made earlier today is about a new variant of the sbgh and dbgh antennas that also get great vhfhi gain.
I recently designed and built a homemade antenna for tv reception. I decided to build the gray hoverman antenna after seeing the published simulation results. Shariff2 1school of physics and material sciences, faculty of sciences, universiti teknologi mara, 40450, shah alam, selangor, malaysia 2academy of contemporary islamic studies acis, universiti teknologi mara. The design presented here is an alternative to a doublebay hoverman antenna. According to wikipedia a fractal antenna is an antenna that uses a fractal, selfsimilar design to maximize the length, or increase the perimeter on inside sections or the outer structure, of material that can receive or transmit electromagnetic radiation within a given total surface area or volume.
In fact, rs used to offer an 8 bay version of this design several years ago, but apparently dropped it in favor of various overpriced yagi designs. With the impending digital switchover, many of you will find yourselves not only in need of a new converter box, but an. It appears that the frequency can be adjusted by altering all dimensions by the ratio of newold frequency. Antenna is an electrical device used to convert electrical power in to radio waves and vice versa. Many antennas are based on halfwave dipoles fabricated from wire or tubing. I left the standard single bay gh6 gray hoverman antenna at the rented house when i moved out to my new place. The designs presented on this page are hoverman style hdtv antennas that utilize a gapless reflector making them easier to build than my revison2 designs. Air tv channels transmit on frequencies ranging from 170 mhz to 860 mhz. Transmitters provide oscillating electrical energy on to the antenna which radiates them as electromagnetic waves. Has anyone made of these lately and is this truly a good. The calculators give you theoretical values, your actual construction will also affect the antenna greatly. Feeding the antenna can be done at the director or at the reflector. What follows is a step by step photo shoot of my version of the venerable hoverman uhf tv antenna based on a design from the late 1950s. This is the last of several instructables covering construction of this antenna that receives uhf stations and, optionally, those in the high end of the vhf b.
The gray hoverman antenna final assembly is straightforward once all the parts are made. The grayhoverman antenna final assembly is straightforward once all the parts are made. In late 2007 and through much of 2008 the hoverman antenna was subjected to computer modeling and a number of improvements were made by a small group of antenna enthusiasts on the digitalhome. Antenna design calculators category is a curation of 83 web resources on, magnetic loop excel sheet, parallel square conductor transmission line calculator, analysis of antenna mast strength and bending stress. A dimensions ore inches measure spacings from wire center wire center. Nec modeling software does not accurately model this antenna. We receive so many pitches for crowdfunding projects. This antenna has been tested to withstand strong winds for years, but it is not guarantee how strong storms can it withstand. The gray hoverman, if built properly, can outperform their equivalent commercial antenna and there are tests that support this. So, im going to build the famous homemade hdtv antenna as seen here on youtube but i have a question regarding splitting a single antenna s signal to 3 tv tuners. From the results, the high gain obtained by the antenna is around 14. The gray hoverman antenna construction for meteor observation. The gray hoverman antenna has been designed by doyt r. The vhf dipole antenna at vhf and uhf, most antenna systems are derived from the dipole or its complement, the slot antenna.
Gray hoverman antennas original hoverman variations, incl antennacraft g1483 and radioshack 151627, sbgh single bay gray hoverman and dbgh double bay gray hoverman analyzed for hivhf and uhf performance using 4nec2. There is nothing wrong with the channel master antenna, mainly im just curious if i can construct a better antenna. The data obtained from the special software named 4nec2. Receiving all these frequencies is difficult when using a single antenna. Hoverman antenna, built from pvc, wire mesh, and some bare copper wire.
How to make a grayhoverman uhf antenna in the 1950s, doyt hoverman designed and patented a television antenna that was sold commercially throughout the next few decades. Viezbicke timeandfrequencydivision instituteforbasicstandards nationalbureauofstandards boulder,colorado80302 tt0for v u. The original antenna was designed by doyt hoverman and patented in 1959 and a unidirectional version patented in 1964. The idea behind this antenna is to replace my existing channel master 4bay antenna cm4221.
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