In this book he documents exactly how he did it with. Introduction to the grayhoverman tv antenna digital forum gh for uhf plans, parts lists, build tips by 300ohm digital forum. Some sources say they have had better success using a gray hoverman homemade antenna. They confirmed that the types of people who buy the book meet the profile above. I have just taken what has been designed, modeled and successfully used in the field, and applied it to my. Any information on the performance of the gray hoverman fractal antenna.
I was wondering if i could get some feedback from anyone using a similar antenna as to its performance. The idea behind this antenna is to replace my existing channel master 4bay antenna cm4221. It is not uncommon for the big tv stations to broadcast overtheair ota for short. 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. Grayhoverman, the wideband tv antenna air tv channels transmit on frequencies ranging from 170 mhz to 860 mhz. Build this multiband fan dipole for all band hf antenna excitement here is a fairly simple and easy to build multi band horizontal fan type dipole that can be constructed for all band operation from 160 meters up thru 6 meters or even higher. Similarly, doubleclick on any individual pdf file to view in the adobe reader program. It was with surprise and delight that i noted that clerks in one radio. Pg1ns ham radio site 70cm projects directional antennas. It has a very high gain but a much narrower bandwidth at its design frequency. In the drawing above, it is shown for just four bands, 80 thru 10.
The arrow antenna will and a hacksaw, yoti will have no problem uclamp at the ba4me point of the antenna. I left the standard single bay gh6 gray hoverman antenna at the rented house when i moved out to my new place. Im curious about why your antenna is wired parallel, i have a pdf of the patent and hh says that it should be connected in series. This antenna has moderately high gain, but its most important pattern feature is that the. Grayhoverman is an easy to build wideband uhf antenna. Aug 07, 20 i left the standard single bay gh6 gray hoverman antenna at the rented house when i moved out to my new place. Very good antenna for both analogue tv and dtv, especially dtv as it outperforms cheap yagis, log, panel and other commercial antennas. It is designed for the uhf region, but above channel 54, the gain drops significantly. Sbgh single bay grayhoverman with 38 resonator rods 12 hivhf, 24 uhf and 2 narods analyzed using 4nec2. Any information on the performance of the grayhoverman. The antenna offers sufficient gain for dvbt, dvbt2, isdbt and atsc reception.
It should be noted first and foremost that i am not an antenna design expert. Has anyone made of these lately and is this truly a good. Attached here is a pdf for use as a guide template. Sbgh single bay gray hoverman with 38 resonator rods 12 hivhf, 24 uhf and 2 narods analyzed using 4nec2. Raleigh, durham, chapel hill, cary the triangle area. 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 grayhoverman antenna designs, schematics, and diagrams. Please note that fringe television reception is very tricky. The grayhoverman antenna final assembly is straightforward once all the parts are made.
Stethe if you use the antenna in the vertical position where a rubber duck and an. Wildwillies x0255x0256 design as modified by 300ohm for symmetry and autogaintest. Compared with my previous antenna, i found that channel 31 from philadelphia came in with a noticably stronger signal. The one i built 2 years ago broke in 12 this winter and has been flopping around for. It is slightly more complex than the gh6 but still it can be approached simply and without any sophisticated tools. Dimensions of homemade hoverman antenna pacific coast. In this section, links are provided to the nec2 files for the above designs. She and her mother recently visited, and were impressed when this loops little brother also described below was able to vastly improve very weak. Perch, a suitable next project would be the grayhoverman tv antenna, which might help you receive some distant hdtv stations. 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.
In future, the current gray hovermans antenna can be improved by adding 2 or more antennas which are. In the past, air tv channels were broadcast on frequencies ranging from 170 mhz to 860 mhz. The c1441 models feature a single input covering vhf and uhf functions while the c1445 model includes internal diplexing and provides separate outputs for vhf and uhf functions. Also, this can easily be mounted to cardboard, pexiglass etc and placed inside the. How to get free hdtv and all your dtv questions answered. Wire antennas for ham radio sun country amateur radio society. Fractal antennas are the latest and the most advanced designs. The only reference to any commercially manufactured hoverman antennas seems to be in the article pdf the hoverman, vud sept 1982, which mentioned a 4 bay hoverman made by antennacraft named the model g1483 and which was also made for radio shack as the model 151627, seen in this photo courtesy of tvlurker. With the olympics coming up, and my local nbc affiliate being in vhfhi, im finally breaking down and building a gray hoverman fractal antenna. Today the gray hoverman buildityourself antenna has been improved yet again, this time with a huge jump in vhfhi gain to make it an. Please register to participate in our discussions with 2 million other members its free and quick. I use this antenna to get channels from nashville tennessee.
The dbgh files had the correct location of the voltage source from the beginning and do not have any known errors. How you can get free hdtv with higher quality than available on your cable or satellite provider. Below is link to pdf drawings that you can download showing measurements. How to build a 35 tilt over antenna tower by david j. Sea perch a remotelyoperated underwater vehicle, easily built and operated by middleschool students from common and inexpensive parts, developed by the mit sea grant college program. The best method of building one from pvc pipe that ive seen was designed by jeff h. Take a look into an organized community response to covid19 with smarter every day. Homebrew 435mhz 12turn helix antenna by ve2zaz this 50ohm impedance antenna, when fed with 25100w of ssb rf at 435mhz, makes reaching amateur satellites such as ao40 and ao10 a snap. Gray hoverman, the wideband tv antenna air tv channels transmit on frequencies ranging from 170 mhz to 860 mhz. Air tv channels transmit on frequencies ranging from 170 mhz to 860 mhz.
How to make a fractal antenna for hdtv dtv plus more on. The grayhoverman homebuilt tv antenna can be assembled from common plastic plumbing pipe and fittings. 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. Receiving all these frequencies is difficult when using a single antenna. Only recently that i had the time to construct an antenna again. Will display 4nec2 text file, outline figure, azimuthal patterns. Pictured below is a schematic of the proposed antenna dubbed xgh8 along side the singlebay gh10 for comparison. The c207 series antenna provides lband coverage for todays communication and datalink radios. The reasons were better gain and its dual band nature, uhf and vhf band iii. The gray hoverman antenna construction for meteor observation. Click to open thumbnail and select html version ignore. A photograph of a typical corner reflector is shown in figure. Some forums can only be seen by registered members. As a baseline, i already had a model for the db2 bowtie antenna, so i ran this simulation first.
The grayhoverman antenna has its roots in a design dating back to the late. The gray hoverman antenna final assembly is straightforward once all the parts are made. The vhfhi band covers 175 to 230 mhz, while uhf covers 470 to 860 mhz. 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. The antenna has 14dbi at its resonant frequency, and does. 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. A length of 12inchdiameter pvc pipe fastened to the vehicles roof rack and antenna acts as a stabilizer. 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. The grayhoverman antenna has been designed by doyt r. You can read more about the history of this design on their web page. From my rural area it picks up 48 channelssubchannels when aimed at transmitters 46 miles north on the far side of washington, d. Its literally two pieces of bent copper wire taped to a piece of plywood, connected with a 75 to 300 ohm transformer like this one, stashed behind the entertainment center. Provides very good performance on both new uhf band ch1451 and hivhf band ch7.
Any information on the performance of the grayhoverman fractal antenna. By adding some additional elements called narods you can also receive vhf band. Ive checked it out a couple of times and all looks like the day i built it. Figure 1 dimensions of the driven elements these j driven elements usually bring several comments from people new to cheap yagis.
Sep 06, 2009 so just push the channel master curve a little to the left to see how a retuned design might compare. The design presented here is an alternative to a doublebay hoverman antenna. The gray hoverman or gh for short is a diy antenna for picking up television broadcasts in the uhf ultra high frequency spectrum. Grayhoverman antenna performance seeing is believing, so lets examine some of the test result diagrams of grayhoverman design variants, paired with similar class commercialbrand competitors for. Gray hoverman the wideband tv antenna antenna radio. Gray hoverman ultra high frequency very high frequency.
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. Some washers werent galvanized so some rust but not enough to make a difference. So just push the channel master curve a little to the left to see how a retuned design might compare. Clerks in radio stores told me that this book was outselling other titles 2. The shield of the coax goes near the center of the top of the element. 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. Gray hoverman antenna ultra high frequency antenna radio. The success of the three previous editions of practical antenna handbook has been most gratifying. The c207 radiation provides omnidirectional coverage in azimuth with its peak gain near the. Gray hoverman the wideband tv antenna free download as pdf file. 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. Gray designs, schematics, and diagrarrys ore copyr.
John e davis has several antennas based on grayhoverman. Nov 26, 2017 the design presented here is an alternative to a doublebay hoverman antenna. Grayhoverman, the wideband tv antenna diy tv antenna. Grayhoverman, the wideband tv antenna one transistor. I decided to build the gray hoverman antenna after seeing the published simulation results. I had chosen the gh10n3 version of the gray hoverman. Wire antennas for ham radio sun country amateur radio. The c144 series multiband communication antenna provides omnidirectional coverage over the 30 to 400 mhz frequency range, utilizing fixed tuning. The antenna is now up and running good except for a bit of double image. Gray hoverman antenna performance seeing is believing, so lets examine some of the test result diagrams of gray hoverman design variants, paired with similar class commercialbrand competitors for comparison.
Erin sanders, who plays the part of teenage inventor quinn on nickelodeons zoey 101 show, with the author. Free after initial startup costs, if you do not have an antenna already generally, a complete setup can pay for itself in the cost of 2 months of. This time he built himself a 35 tall free standing antenna tower thats every bit a professional job except that it cost him pennies instead of hundreds of dollars. John e davis has several antennas based on gray hoverman. Gertrude stein to change the meaning of a name is to change the world. Open hardware journal november 1, 2011 openaccess journal, free to read, copy, and redistribute.
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