It appears that the frequency can be adjusted by altering all dimensions by the ratio of newold frequency. Grayhoverman antennas original hoverman variations, incl antennacraft g1483 and radioshack 151627, sbgh single bay grayhoverman and dbgh double bay grayhoverman analyzed for hi vhf and uhf performance using 4nec2. The common would be to broadcast analog signals in the vhf region. This is one of several of my instructables related to building this antenna. Feb 21, 2010 since the ball had started rolling in constructing antennas previously for my wireless client and the access point, i began to search for a good high gain uhf antenna. Ultimate tv antenna vs gray hoverman tv antenna duration. See the following document for the allocations after the switch. After a while, my attention was immediately focused on a little known, at least to me, gray hoverman antenna.
Grayhoverman, the wideband tv antenna diy tv antenna. Gray designs, schematics, and diagrarrys ore copyr. Nvm will be going with a gray hoverman antenna design. The reasons were better gain and its dual band nature, uhf and vhf band iii. Hdtv antenna gray hoverman vs fractal bowtie youtube. It uses selfsimilar designs and, as a result, one gets reduced antenna size in comparison with classical antenna types for the same gain, or better gain per size, if you like and better bandwidth. Make this jig for bending tophat narod elements that add vhf high reception to the gray hoverman homebuilt tv antenna.
Jan 18, 2015 grayhoverman is an easy to build wideband uhf antenna. I use the four bar signal meter on my tv to document. The gray hoverman antenna construction for meteor observation z. Gray hoverman, the wideband tv antenna air tv channels transmit on frequencies ranging from 170 mhz to 860 mhz. One that has garnered a lot of attention from diy people is called the grayhoverman antenna. It has a very high gain but a much narrower bandwidth at its design frequency. Ultimate tv antenna vs gray hoverman tv antenna youtube.
Half wave dipole tv antenna, impedance and gray hoverman. However, fractal antennas and its superset fractal electrodynamics werner and mittra, 1999 is a hotbed of research activity. After a while, my attention was immediately focused on a little known, at least to me, grayhoverman antenna. His work would have been entirely created and improved by field testing, trial and error, and with a great amount of calculation without the benefit of electronic devices. 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. 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. I test both antennas on at a time in the same spot, at the same height and in the same direction. Jun 15, 2017 gray hoverman and fractal bowtie comparison. Grayhoverman antennas original hoverman variations, incl antennacraft g1483 and radioshack 151627, sbgh single bay gray hoverman and dbgh double bay gray hoverman analyzed for hi vhf and uhf performance using 4nec2. See the following document for the allocations after the switch pdf. We tested the vhf performance of this screen hoverman as well not expecting much. The vhf hi band covers 175 to 230 mhz, while uhf covers 470 to 860 mhz.
A bandpass filter for general purpose is designed at 5. Grayhoverman, the wideband tv antenna air tv channels transmit on frequencies ranging from 170 mhz to 860 mhz. A substrate integrated waveguide siw filter with compact size compared to traditional siw filters are presented in this work. Build the venerable hoverman tv antenna and watch digital broadcast. Grayhoverman tv antenna reflector rods part 14 steps diy tv antenna, wifi. To our surprise, the antenna has adequate, even superior, performance on the high vhf band channels 7. The grayhoverman or gh for short is a diy antenna for picking up television broadcasts in the uhf ultra high frequency spectrum. 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. A forward scattering technique for radio meteor detection has been wellknown for over 50 years ago. In this adorable little video, makers in the making, naomi and noah, show you how, proving that its so easy, even a child can do it with a little prompting from dad behind the camera. Diy tv antennas very high frequency ultra high frequency. Gray hoverman antenna performance designs, schematics, and diagrams join the digital forum discussion the gray hoverman antenna designs, schematics, and diagrams. One of our most searchedon and linkedto subjects is how to make a grayhoverman dtv antenna.
There are several variations on it since it was first proposed about 60 years ago by its creator. 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. I decided to build the gray hoverman antenna after seeing the published simulation results. Grayhoverman tv antenna reflector rods part 14 steps diy tv antenna. The gray hoverman antenna construction for meteor observation. I have read most of the forums and ken nist hdtv info with some semblance of. I left the standard single bay gh6 gray hoverman antenna at the rented house when i moved out to my new place. Posted in home entertainment hacks, home hackstagged antenna, digital. Nov 26, 2017 the design presented here is an alternative to a doublebay hoverman antenna. Dec 21, 2017 grayhoverman is an easy to build wideband uhf antenna. Build a massive hdtv antenna for long distance gains. The antenna offers sufficient gain for dvbt, dvbt2, isdbt and atsc reception. It is not uncommon for the big tv stations to broadcast overtheair ota for short.
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. Resembling a giant insect or alien creature, the antenna eventually fell into obscurity. I wonder if some one could give the specifications for a grayhoverman wifi antenna. 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. Hoverman antennas seems to be in the article pdf the hoverman, vud sept. Please note that fringe television reception is very tricky. I have avoided replicating gh results found elsewhere. First question is why are all high gain vhf antennas of the yagi style with the exception of the c5.
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. 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. With the olympics coming up, and my local nbc affiliate being in vhf hi, im finally breaking down and building a grayhoverman fractal antenna. Only recently that i had the time to construct an antenna again.
The antenna is broadband and althought its designed for uhf tv channels with gain, it will also receive vhf channels. There is a newer designs address this problem by adding narods not a reflector or director to both ends of the antenna. In this video i have the ultimate tv antenna vs gray hoverman tv antenna. In the research journals, we see reports of active research. The gray hoverman is a very good uhf antenna antenna design. The model you see here is what results when a little grayhoverman antenna visits the beach, gets washed into a. The gray hoverman homebuilt tv antenna can be assembled from common plastic plumbing pipe and fittings. 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. The design presented here is an alternative to a doublebay hoverman antenna. The grayhoverman antenna is an open source design that shows high. The grayhoverman antenna is about the same size as a bowtie antenna.
Since the ball had started rolling in constructing antennas previously for my wireless client and the access point, i began to search for a good high gain uhf antenna. 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 vhf hi gain. The following plots show the hoverman at rf channels 7, 9 and. It is the best receiving dipole, because it has the greatest bandwidth. By adding some additional elements called narods you can also receive vhf band. The problem is your cbs channel is being transmitted on vhf channel 12. 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. This has been going on since the beginning of television. 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. Jan 18, 2009 my trouble is a lot of the canadian stations i can see from tvfool are in the lo vhf band. 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. To see the others and my related instructables, cli. This antenna is recommended when fm receiver has 300.
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. As i understand it the grayhoverman antennas are for uhf frequencies and have almost zero gain at lo vhf. John e davis has several antennas based on gray hoverman. Digital tv is broadcast in two bands, vhf high rf channels 7. Some sources say they have had better success using a gray hoverman homemade antenna. It looks like a bunch of enthusiasts updated the design for the modern uhf band and renamed it. 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.
Below is link to pdf drawings that you can download showing measurements. Receiving all these frequencies is difficult when using a single antenna. 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 signals within a given total surface area or volume. The hack id like to see is a fractal antenna designed for vhf. Part id description quantity 12 pvc pipe, schedule 40, 10foot lengths 3 a 12 pvc caps 18 b 12 pvc tees 32 c 12 pvc cross 6 pvc primer clear 12 pint 1.
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. Pictured below is a schematic of the proposed antenna dubbed xgh8 along side the singlebay gh10 for comparison. Any information on the performance of the grayhoverman. Feb 08, 2009 25 thoughts on gray hoverman uhf antenna. Fractal antennas are the latest and the most advanced designs. This version of a hdtv antenna uses amateur radio antenna building. How to make a fractal antenna for hdtv dtv plus more on the. The grayhoverman antenna designs, schematics, and diagrams. Build the venerable hoverman tv antenna and watch digital broadcast high definition hdtv television this weekend. The grayhoverman antenna final assembly is straightforward once all the parts are made.
This is a fractal antenna anchored to some clear plastic so you can just hang. Nvm will be going with a grayhoverman antenna design. Building an antenna for vhf channel 11 and uhf channel 16. The model you see here is what results when a little gray hoverman antenna visits the beach, gets washed into a. This all came about to finally obtain offtheair ota signals for our tv. Any information on the performance of the grayhoverman fractal antenna. The grayhoverman antenna has been designed by doyt. I had chosen the gh10n3 version of the gray hoverman. John e davis has several antennas based on grayhoverman. Introduction in the study of antennas, fractal antenna theory is a relatively new area. You can read more about the history of this design on their web page. Compared with my previous antenna, i found that channel 31 from philadelphia came in with a noticably stronger signal. This antenna has been tested to withstand strong winds for years, but it is not guarantee how strong storms can it withstand.
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. Has anyone made of these lately and is this truly a good. In addition to the foam core board and copper tape, youll also need a really cheap balun transformer which you can get at any electronics store, two wood screws or solder to attach it, and a coaxial cable to connect it to. My trouble is a lot of the canadian stations i can see from tvfool are in the lo vhf band. Grayhoverman is an easy to build wideband uhf antenna. Grayhoverman antenna performance designs, schematics, and diagrams join the digital forum discussion the grayhoverman antenna designs, schematics, and diagrams. Grayhoverman, the wideband tv antenna one transistor. It looks like a bunch of enthusiasts updated the design for the modern uhf band and renamed it the gray hoverman. Today the gray hoverman buildityourself antenna has been improved yet again, this time with a huge jump in vhfhi gain to make it an. Vhfhi band covers 175 to 230 mhz, while uhf covers 470 to 860 mhz. Design of the grayhoverman antenna digital home canada.
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