Clerks in radio stores told me that this book was outselling other titles 2. Measured pattern of hoverman tv antenna using wnvt as test signal. I recently completed this antenna made from parts and materials from home center and hardware store. The antenna offers sufficient gain for dvbt, dvbt2, isdbt and atsc 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.
I made a shape similar to the square shooter and after much tinkering ended up with something that was slightly better than the other antennas i built but around 9 x 9. The success of the three previous editions of practical antenna handbook has been most gratifying. Farquhar, computer security professional, train hobbyist, and landlord. Digital tv coat hanger antenna page 3 digital tv coat hanger antenna step 3. It is designed for the uhf region, but above channel 54, the gain drops significantly. Design of the grayhoverman antenna digital home canada.
I have designed and computer modeled a vhfhi and uhf combo version of the gray hoverman. The gray hoverman homebuilt tv antenna can be assembled from common plastic plumbing pipe and fittings. Wooden board, 1by4, 4 feet long6 machine screws, 14 inch, 34 inch long6 nuts, 14 inch12 washers, 14 inchelectrical wire with insulation removed, 14gauge, 10 feetmatching transformer, 300ohm to 75ohmcoaxial cable, 75ohm, 12 feet longpower drill and 14inch. The square shooter is made up of a number of half circles of diminishing sizes. Many antennas are based on halfwave dipoles fabricated from wire or tubing. The problem is your cbs channel is being transmitted on vhf channel 12. Only recently that i had the time to construct an antenna again. One of our most searchedon and linkedto subjects is how to make a grayhoverman dtv antenna.
John e davis has several antennas based on grayhoverman. Dbgh double bay gray hoverman antenna acronymfinder. Compared with my previous antenna, i found that channel 31 from philadelphia came in with a noticably stronger signal. Nvm will be going with a grayhoverman antenna design. Cheap leo antenna drew, ko4ma, using the cheap leo antenna during a dayton amsat leo demonstration hand held dual band antennas are popular for qsos through many of the low earth orbit leo satellites. This antenna is recommended when fm receiver has 300.
Gray designs, schematics, and diagrarrys ore copyr. So just push the channel master curve a little to the left to see how a retuned design might compare. In the past, air tv channels were broadcast on frequencies ranging from 170 mhz to 860 mhz. If youre 50 miles out, then the amount of signal you will lose due to. The actual grid is 12 inch, but 4nec2 coughed at so many wires. The design presented here is an alternative to a doublebay hoverman antenna. Grayhoverman, the wideband tv antenna one transistor. Scribd is the worlds largest social reading and publishing site. The gray hoverman is a very good uhf antenna antenna design.
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 designs presented on this page are hovermanstyle hdtv antennas that utilize a gapless reflector making them easier to build than my revison2 designs. Cut four coat hangers and remove finish cut apart four wire coat hangers as shown in the diargram below to obain eight vshaped pieces of wire, each side of the v being 8 long with a. The light green line is the simulation response of this particular antenna design at 566 mhz using a 3 x 4. The feed point is usually placed at the centre of the dipole, for although this is not absolutely necessary, it can help prevent.
Contents 1 introduction 1 2 electrical and other safety issues 21 3 using your roof space 29 4 stealth antennas for the loft 37 5 external antennas 75. A grayhoverman antenna is a cheap antenna with good range for picking up tv channels over the air that you can make yourself in about an hour. 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. This definition appears somewhat frequently and is found in the following acronym finder categories.
Oct 18, 2015 grayhoverman is an easy to build wideband uhf antenna. Grayhoverman, the wideband tv antenna diy tv antenna. They confirmed that the types of people who buy the book meet the profile above. However, with some improvements, the antenna can receive well both the uhf as well as vhfhi. I decided to build the grayhoverman antenna after seeing the published simulation results. It was with surprise and delight that i noted that clerks in one radio. Any information on the performance of the grayhoverman. It appears that the frequency can be adjusted by altering all dimensions by the ratio of newold frequency. So its curve may be closer to that of the grayhoverman.
Photo of light weight, flexible single bay grayhoverman designed and built by keo. Guesstimating an angle of 70 degrees and setting the tv to autoprogram. The antenna has 14dbi at its resonant frequency, and does. By adding some additional elements called narods you can also receive vhf band. I left the standard single bay gh6 gray hoverman antenna at the rented house when i moved out to my new place. Ive also design and computer modeled a fractal version of the gh too. All the dtv stations in the area are between 65 and 82 degrees at ranges of 7 to 15 miles. It is the best receiving dipole, because it has the greatest bandwidth. 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. 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. This post will show two variants of this antenna that can be used to receive 170. Gray hoverman antenna started by admin, april 21, 2017. Please note that fringe television reception is very tricky. With the olympics coming up, and my local nbc affiliate being in vhfhi, im finally breaking down and building a grayhoverman fractal antenna.
There are plenty of antennas you can buy to help boost your signal strength, but few of them are as effective as the grayhoverman antenna. The gray hoverman is a series of half squares set on top of each other. Photo of pvcfabricated double bay grayhoverman designed and built by dogt. The grayhoverman homebuilt tv antenna can be assembled from common plastic plumbing pipe and fittings. What made me attracted to this design was the high gain plateau that covered most of the channels im interested in. 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. The gray hoverman antenna final assembly is straightforward once all the parts are made. Half wave dipole tv antenna, impedance and gray hoverman. Below is link to pdf drawings that you can download showing measurements. In future, the current gray hovermans antenna can be improved by adding 2 or more antennas which are. It looks like a bunch of enthusiasts updated the design for the modern uhf band and renamed it. This antenna has been tested to withstand strong winds for years, but it is not guarantee how strong storms can it withstand. 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 designs presented on this page are hoverman style hdtv antennas that utilize a gapless reflector making them easier to build than my revison2 designs. I was wondering if i could get some feedback from anyone using a similar antenna as to its performance. Grayhoverman is an easy to build wideband uhf antenna. The grayhoverman antenna has been designed by doyt r. After a while, my attention was immediately focused on a little known, at least to me, grayhoverman antenna. It has a very high gain but a much narrower bandwidth at its design frequency.
I have tried to explain how this antenna and the mclapp antenna work, but left the real technical details for others to explain try googling. This article covers several 145 mhz antennas, a larger number of 435 mhz antennas, and how to combine them into one antenna. Dbgh stands for double bay gray hoverman antenna suggest new definition. The gray hoverman antenna has been designed by doyt r. How to make a grayhoverman uhf antenna know about life. Jan 22, 2017 grayhoverman is an easy to build wideband uhf antenna. The reasons were better gain and its dual band nature, uhf and vhf band iii. Hoverman in 1959, the device is called a super antenna because it greatly increases the range and number of channels you can pick up. The color pdf drawing i used to build my antenna may be found at this link. The vhf dipole antenna at vhf and uhf, most antenna systems are derived from the dipole or its complement, the slot antenna. Very good antenna for both analogue tv and dtv, especially dtv as it outperforms cheap yagis, log, panel and other commercial antennas.
Gray hoverman antenna ultra high frequency antenna radio. The grayhoverman tv antennas plastic frame can be assembled using a jig that. From my rural area it picks up 48 channelssubchannels when aimed at transmitters 46 miles north on the far side of washington, d. It should be noted first and foremost that i am not an antenna design expert. I built this antenna to go in the attic and got spectacular results with it just sitting on the floor in an aluminumsided house. I have just taken what has been designed, modeled and successfully used in the field, and applied it to my. The gray hoverman antenna construction for meteor observation.
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