8 bay gray hoverman antenna design pdf

Gnn4 is a larger 98in x 98in with 8 narods in the middle, providing better gain on ch7. Grayhoverman is an easy to build wideband uhf antenna. The gray hoverman antenna has been designed by doyt r. Dbgh double bay gray hoverman with 28 reflector rods 3 8 in o. According to the enthusiast in an online forum, the original design of the gray hoverman antenna had a poor. Jan 22, 2015 i recently designed and built a homemade antenna for tv reception.

Stack two grayhoverman antennas and the model shows better incore uhf performance than the popular channel master 4228 8 bay bowtie antenna. It does look like the one in the picture is over engineered, but it would last for years if erected outdoors. Hovermans original design for a television antenna was. Antenna design and original eznec file posted by 300ohm on. He made us a double bay grayhoverman antenna from pvc, 12x12 square wire mesh field fencing, 8 gauge copper wire, stainless steel screws, and a balun. Below is link to pdf drawings that you can download showing measurements. Performance with a 4bay grayhoverman antenna is shown to beat the. Jun 15, 2017 gray hoverman and fractal bowtie comparison. The only one i kept was a dbgh double bay gray hoverman. Measured pattern of hoverman tv antenna using wnvt as test signal. The antenna offers sufficient gain for dvbt, dvbt2, isdbt and atsc reception. I recently designed and built a homemade antenna for tv reception.

It appears that the frequency can be adjusted by altering all dimensions by the ratio of newold frequency. The idea behind this antenna is to replace my existing channel master 4 bay antenna cm4221. This post will show two variants of this antenna that can be used to receive 170. The gray hoverman, if built properly, can outperform their equivalent commercial antenna and there are tests that support this. I decided to build the grayhoverman antenna after seeing the published simulation results. It should be noted first and foremost that i am not an antenna design expert. The unpatented grayhoverman antenna designs are available for anyone to. To see my new design based on the grayhoverman antenna and the reflector i added to it, stay tuned to this blog by subscribing to the rss feed or the email newsletter at the top of this page and you will be informed as soon as i have posted it. It only covered the lower part of uhf, from 470 to 720 mhz 21 52 channels. The gray hoverman is a very good uhf antenna antenna design.

Many antennas are based on halfwave dipoles fabricated from wire or tubing. John e davis has several antennas based on grayhoverman. The grayhoverman antenna has its roots in a design dating back to the late. 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. How to make a grayhoverman uhf antenna know about life. So we will first discuss properties of wideband antennas, and then discuss the infinite bowtie antenna, and then measurements and properties of the real bowtie antenna. 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. One of our most searchedon and linkedto subjects is how to make a grayhoverman dtv antenna. I added 2 narods cut 12 wavelength for ch 7 and folded several inches on the ends to match the length of the hoverman elements on the top and bottom spaced.

Mar 05, 2015 i built the gray hoverman single bay antenna with a pvc frame using a split screen wire mesh reflector, mounted it in the attic and it was able to drive 5 televisions with no amplifier. Hobbyists create gpled diy super tv antenna slashdot. The tradeoff is that the gain of the grayhoverman antenna falls off rapidly at higher channels, and especially above channel 54, where it has less gain than the 4228. Driven array 56 dual segments with 8 subsections of 7 same as the first design. In the 1950s, doyt hoverman designed and patented a television antenna that was sold commercially throughout the next few decades. The square shooter is made up of a number of half circles of diminishing sizes. Reflector rods, six for uhfonly, eight for uhf and vhfhigh, see instructable.

Oct 27, 2009 one of our most searchedon and linkedto subjects is how to make a grayhoverman dtv antenna. The gh is a gold standard gh6 singlebay design with six reflectors built according to plans outlined in the digitalhome. The grayhoverman that was used for toronto reception or this antenna if i dont use it for to, will then be experimented with to see if i can pick up anything from erie, or london way, or i may gang it with the other grayhovermand towards buffalo, and use it as a horizontal 2. 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. To see my new design based on the gray hoverman antenna and the reflector i added to it, stay tuned to this blog by subscribing to the rss feed or the email newsletter at the top of this page and you will be informed as soon as i have posted it. The problem is your cbs channel is being transmitted on vhf channel 12. Page 8 template, and it will help keep things straight. Design of the grayhoverman antenna digital home canada. If that could have been a problem, its not anymore. Hdtv antenna gray hoverman vs fractal bowtie youtube. Driver ore 6 solid bare copper wire, feedines ood,norods ore h 10 sod bore topper wre refectors ore copper.

Also included are designs for 4 and 8 pair models, as well as a narrow and. If youre in middle atlanta, id suggest a basic loop antenna and see what you get. Only recently that i had the time to construct an antenna again. The grayhoverman, if built properly, can outperform their equivalent commercial antenna and there are tests that support this. John e davis has several antennas based on gray hoverman. The design of the antenna has a little modification from the original design in order to increase the performance. There is nothing wrong with the channel master antenna, mainly im just curious if i can construct a better antenna. Sep 06, 2009 so just push the channel master curve a little to the left to see how a retuned design might compare. The actual design can be seen here it is covered by a gpl open source license see the digitalhome forum link for details. So just push the channel master curve a little to the left to see how a retuned design might compare. The gray hoverman that was used for toronto reception or this antenna if i dont use it for to, will then be experimented with to see if i can pick up anything from erie, or london way, or i may gang it with the other gray hovermand towards buffalo, and use it as a horizontal 2 bay gh, and see if i can get more gain towards buffalo. So its curve may be closer to that of the gray hoverman. I test both antennas on at a time in the same spot, at the same height and in the same direction. The grayhoverman antenna has been designed by doyt r.

I left the standard single bay gh6 gray hoverman antenna at the rented house when i moved out to my new place. 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. Farquhar, computer security professional, train hobbyist, and landlord. I have designed and computer modeled a vhfhi and uhf combo version of the gray hoverman. 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. Ghn2 is constrained to about 89in x 89in with 4 narods in the middle.

Photo of light weight, flexible single bay grayhoverman designed and built by keo. The vhf dipole antenna at vhf and uhf, most antenna systems are derived from the dipole or its complement, the slot antenna. So its curve may be closer to that of the grayhoverman. Photo of pvcfabricated double bay gray hoverman designed and built by dogt. There is a newer designs address this problem by adding narods not a reflector or director to both ends of the 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. It has a very high gain but a much narrower bandwidth at its design frequency. Hoverman in 1959, the device is called a super antenna because it greatly increases the range and number of channels you can pick up. 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. Oct 18, 2015 grayhoverman is an easy to build wideband uhf antenna. The grayhoverman or gh for short is a diy antenna for picking up. Mar 14, 2008 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.

I use this antenna to get channels from nashville tennessee. Nov 26, 2017 the design presented here is an alternative to a double bay hoverman antenna. Photo of light weight, flexible single bay gray hoverman designed and built by keo. According to the enthusiast in an online forum, the original design of the gray hoverman antenna had a poor swr performance after much research and attempt being. 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. Make a grayhoverman dtv antenna with naomi and noah. 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. I built the gray hoverman single bay antenna with a pvc frame using a split screen wire mesh reflector, mounted it in the attic and it was able to drive 5 televisions with no amplifier. The grayhoverman antenna for uhf television reception.

Grayhoverman, the wideband tv antenna diy tv antenna. The design presented here is an alternative to a doublebay hoverman antenna. All of which we had lying around yep even the balun. 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. The idea behind this antenna is to replace my existing channel master 4bay antenna cm4221. It would not be too surprising if they drop the 4bay hoverman soon, as such national chains tend to. Jun 30, 2010 the gray hoverman antenna is well worth the effort to build. The tradeoff is that the gain of the grayhoverman antenna falls off rapidly at higher channels, and especially above channel 54. Oct 18, 2015 gray hoverman is an easy to build wideband uhf antenna. The grayhoverman antenna is well worth the effort to build.

Cm4228hd is the new channel master 8 bay bowtie reflector pr8800 is made by winegard data from hdtvprimer db 8 is made by antennas direct data from hdtvprimer 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. The feed point is usually placed at the centre of the dipole, for although this is not absolutely necessary, it can help prevent. 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 had chosen the gh10n3 version of the gray hoverman.

I use the four bar signal meter on my tv to document. The average gain in this frequency range is dbi with reflector and 9. I might have built 2030 different models, mostly out of fun. Back to the hoverman, a single bay antenna consists of a single elemental pairing, where a.

Single bay grayhoverman sbgh for nearby to fringe reception range approx. The gray hoverman is a series of half squares set on top of each other. However, with some improvements, the antenna can receive well both the uhf as well as vhfhi. Resembling a giant insect or alien creature, the antenna eventually fell into obscurity. Hoverman antennas seems to be in the article pdf the hoverman. You can read more about the history of this design on their web page. The actual grid is 12 inch, but 4nec2 coughed at so many wires. 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. 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. Let me know if you have tried this design and what your results were in the comments below. This month ill describe the new uhf receive antenna design that was released recently. Pictured below is a schematic of the proposed antenna dubbed xgh8 along side the single bay gh10 for comparison.

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. Pictured below is a schematic of the proposed antenna dubbed xgh8 along side the singlebay gh10 for comparison. The reasons were better gain and its dual band nature, uhf and vhf band iii. The grayhoverman antenna final assembly is straightforward once all the. Photo of pvcfabricated double bay grayhoverman designed and built by dogt. 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. By adding some additional elements called narods you can also receive vhf band. Since this is a dual bay antenna, there are more heavy copper wires going from here to the matching spot on the upper bay. The light green line is the simulation response of this particular antenna design at 566 mhz using a 3 x 4. In the past, air tv channels were broadcast on frequencies ranging from 170 mhz to 860 mhz. Bowtie antennas arent really log periodic antennas. Grayhoverman, the wideband tv antenna one transistor.