loading
This TV antenna is not only omnidirectional, but also compatible with the new digital television. I actually get more stations with the new digital television signals than the old system. I get 35 channels and I an a long way from any large city. Some of the stations are over 60 miles away.

Construction is simple using copper tubing, PVC pipe and minimal tools. Tools include a hack saw, drill (hand or electric) screw driver and tape measure.

Step 1: Making the antenna step 1

Start with some 3/8 or 1/2 inch copper tubing. Bend a half circle in a 26 inch diameter with an additional 1 inch extra on each end. Flatten the inch on the ends and bend them OUT. Now make another half circle and bend the ends IN.

Advertisement

<p>I found your plans. Made a few adjustments and had at building one of my own.</p><p>Center plates are cut 6&quot; square - nylon cutting board. </p><p>3/4 PVC arms</p><p>Center section Nuts and Bolts are 1-3/4 10s. Blue thread lock.</p><p>All of the other screws are 1/2&quot; 8s. left over from building a garden shed.</p><p>Pipe is 1/2 inch outside soft copper coil. 84&quot; cut in 2. Added 45s, a short spacer and caps.</p><p>Everything 1/2&quot; 8 is drilled and tapped.</p><p>Copper caps are drilled and tapped # 8 for attaching matching transformer</p><p>Shown here without mounting brackets attached.</p><p>The Antenna is working well at ground level. Looking forward to standing a tower and mounting it properly! Ron</p><p>Screws 1 - 3/4 10s</p>
<p>Update:</p><p>Poor performance above channel 42 prompted me to re read the instructions.</p><p> I then re measured my tubes.</p><p>Each tube was 50&quot; a full 8&quot; longer than the plans called for. Then add 2&quot; for the 90 deg elbow and the spacer on each end. After careful measurements where taken.</p><p>I removed the 90 deg elbows, spacers and caps from both ends of each tube.</p><p> Cut the pipes 39&quot; then re attached the 90 deg elbows mounting spacers and end caps. Adjusted the 3/4 PVC arm lengths. Re bent the tubes to fit and re mounted the tubes. </p><p>Boom! The picture cleaned right up on 29 &amp; 42, 51 is now not only there but flawless! Transmitter towers are close. After that everything is 45 and 60 miles.</p><p>Hoping to get them.</p><p>Tower is laid out in the back yard. will be mounting the antenna and standing the tower in the next few days. Will post pictures and results. </p><p>Ron</p>
<p>I'm thrilled to confirm how well my project antenna is working! The tower is standing. The head is now 35' off the ground and working very well. </p><p>As everything is out 60 miles, I installed a Channel Master 15db pre-amp and I have 22 channels clear as a bell. </p><p>Great project </p>
<p>BY far the best antenna I have eber made, Although I built mine smaller about a foot and a half. </p>
<p>26 inch Diameter-- the circumference or length will be C= 3.14 x 26 = 81.64 inch length minimum of cooper tubing. So at least 2-two 42 inch cooper tube, bent in a semi 26 circle. NOT a 26 inch tube.. BUT more than 82 INCH COPPER TUBING !!!</p>
<p>I just built this antenna, exactly you instruct, and was only able to pick up about 10 channels. That was even with a signal booster. That is about a third of the channels my store bought antenna picks up. Any suggestions?</p>
<p> You need larger wing span for more channels. My RCA antenna is 150 inches which is huge, so you need a big wheel 12ft or larger wheel</p>
If you change the diameter you change the frequency it will receive and no longer receive tv frequencies. The lengths of antennas is what &quot;TUNES&quot; them to the frequencies you want and rejects the ones you don't want.
<p>Not necessarily... As a instructor in a ham radio class I took many years ago said, You could receive signals off a wet piece of string, but only for the wavelength you have the string cut. rbodell's 26&quot; Dia. circle is just the right full-wavelength (Both high &amp; low of the sinewave).. Anything bigger, would be wasted bandwidth pick-up. Even a 13&quot; circle (1/2-wavelength) would still pick-up signals within quite a few miles.. But, bigger? You're probably talking Analog VHF... </p>
Normally this antenna does better than most commercial antennas so there is probably something not rite.<br><br>Nearby trees can knock down the signal as well as buildings and mountains.<br><br>The height of the antenna can make a big difference with just a few feet sometimes. Get it as high as possible.<br><br>make sure that the two halves of the antenna are electrically disconnected. They can not touch.<br><br>That should get you going<br><br>
<p>I made your easy to do antenna. It works better than any of the factory antennas I have bought. Thank you for the instructions! </p>
<p>This was made by my husband Marvin Felz but I helped some ;)</p>
<p>Very good design: nice, easy, cheap and efficient. This week I will make one of these. </p>
<p>Great, let us know how it comes out.</p>
<p>Well, after a few days doing other things, today I finished and installed it. It works perfect for UHF, but for VHF is poor. I wonder if the adapter 300 to 75 Ohms is really necessary.<br><br>The hardest part of all was placing it on the ridge of the house, because put in place the reins to stand it upright was not easy, I broke four colonial tiles, which are not cheap nor easy to get.<br><br>At end, I am very satisfied with the result, thanks for the idea. I regret not having taken any photo, is that I worked hurry because here is winter and the afternoon is short.</p>
That is what is cool about this. It doesn't cost anything to experiment
<p>Esta era mi antena. Captaba muchos canales cuando el tiempo estaba bueno, pero cuando empezaba a llover se cortaban casi todos. Lo consult&eacute; con un experto en antenas y me sugiri&oacute; reemplazarla por una direccional. FUNCION&Oacute;. A la m&iacute;a la vend&iacute; por Mercado Libre en unos 5 U$D.</p><p>---------------------------</p><p>This was my antenna. It captured many channels when the weather was good, but when it started to rain were cut almost everyone. I consulted with an expert in antennas and suggested replacing it with a directional. IT WORKED. </p><p>Mine (this) I sold on the free market in about 5 U$D.</p>
<p>?Como hacer esto (instructions)? </p>
<p>For best operation, the match is important. It also covers any mistakes in length of the antenna halves.</p>
<p>When you say &quot;match&quot; &iquest;do you refer to the 300 to 75 Ohms adapter? Please consider I don't speak English. Neither I understand when you say &quot;antenna halves&quot;, pardon.</p>
<p>YES.</p><p>The better matched the antenna is to the receiver, the better they both work.</p>
<p>I built this and I am impressed. It works great, and is omnidirectional. I had a problem pushing the copper tubing through the holes. I would suggest, at additional expense, to drill holes through pvc couplings and then put the tubing through those holes and bend and glue couplings to &quot;star&quot; pipes. I wish I had thought of that before I made mine. All in all agreat easy project that works great!</p>
Just wondering do you think for the hoop sections some pex or other type of flexible pvc pipe wraped in copper tape would work?
Yes that should work fine. This is very flexible in materials.
thanks. trying to do a solid copper one first trying at 480mm diameter as we are in a DVBT /PAL as someone wlse comented on here.
<p>Would larger diameter copper tubing and a larger loop going to increase my reception. I have about a 10' section of 1' copper tubing left over from plumbing project.</p>
No the length determines the frequencies it receives best
Thanks Rich for your reply on length. What diameter do you recommend for best reception 3/8, 1/2, 1&quot; or # 6 or 8 copper grounding wire.<br>
I noticed you used a 75ohm coaxial cable to connect to the matching transformer. Is this part of the design or would a 300 ohm ribbon work better instead?
Never tried it but probably about equal . but does your TV have the screw connectors for flat wire? If not you will need the matching transformer on the other end to connect to the cable jack.
Interesting question, thanks for asking. I see no reason it shouldn't work as long as you have an older television where the antenna connection has screws you can put the other end under. If not you will need the matching transformer on the television end of the 300 ohm cable to connect to the more modern coax connection.<br><br>As for it working better, I Don't THINK so.<br>The ground around the outside of the 75 ohm cable shields it from other signals where the 300 ohm wire won't be protected from spurious signals of different frequencies such as engine spark plugs florescent lights and transformers.<br><br>With the ribbon wire you mentioned, the spacing is determined by the frequency. I don't even know if the ribbon wire does reject any outside signals from other tv frequencies. AS FAR AS I KNOW the spacing only keeps the signal from interacting between television frequencies and coax protects it from all frequencies. Would somebody correct me if I am wrong.<br><br>In the end it will probably be harder to find the 300 ohm wire and I seriously doubt the price will be worth the hassle.<br><br>If you do give it a try, please comment back and let me know the results of your experiment.
It's a perfect tv antenna. Its omnidirectional design is just right where we live considering the source of the signals from different tv stations at different strengths. Now, I can pick em all up like they come from just one direction only. But my only problem was that the loop offers a strong invitation to birds to alight on the tubes. One medium sized bird did alight one day and broke my PVC ... I redesigned the loop to face the wind instead ... the signal is still the same. . . but the birds are gone. Thanks a load.
<p>Ha-ha was just thinking about the pigeons sitting on my stacked yagi old school antennas when I came across your post. The design is great, as is Omnitennas above (going to try to back engineer that pup :) But I need to stand it on it's side 'cause we have lot's of pigeons.</p>
<p>I love old technology. Just scale things back to what really works best. I am in the process of building a house in Alaska that will have less living expenses than in the lower 48. Nothing new, just old technology and basic science.</p>
Actually, coax and twinlead prettymuch equally reject noise. The reason twinlead rejects it is because it's a balanced pair - and the noise is equal on both leads - it gets canceled out in the input transformer, as long as the noise signal is equal on both leads. <br>The disadvantage with twinlead is that it shouldn't touch metal, which can change the impedance on the cable. That's why the standoff insulators are important when using twinlead.
Thanks for that.
I built this one a couple months ago for my grandparents. Closest station is 65 miles, farthest close station 90 miles. This thing is picking up both sets of dtv stations. Now im going to duplicate and add on another antenna to this one to pick up a single set of vhf stations and combine them hopefully
<p>i have 3/4 inch pipe for pole bought a threaded cap for the pipe drilled through it and the center of the 4 way fitting bolted the cap to it let my pole down and screwed the antenna right to the pole </p>
<p>made one works really great better then the antenna i had thanks for the plans </p>
<p>Made this antenna today and it performs a lot better than the amplified indoor antenna I was using. Mounted on the roof of the boat on a 4&quot; tall pipe (total about 7' off the ground). Receives channels up to 60 miles away. Purchased all parts at Lowes for about $30.00. I used a 3/4&quot; cross for a stronger center hub then reducer bushings to mount 1/2&quot; pvc radials. The loop is 1/4&quot; copper tubing fastened as per instructions with brass bolts. Rather than slot the ends of the 2 support radials, I drilled a hole and slipped the tubing through the pipe. The cross is bolted to a 1-1/4&quot; PVC threaded cap (this cap is flat on top instead of rounded like the slip cap) it's screwed to a slip to thread coupler, this will allow me to rotate the antenna some on the threads if needed or remove it for trailering the boat. Once I'm anchored I'll be able to add a 6' to 8' section of mast (1-1/4PVC) if needed.</p>
Thanks for the update. Glad it worked out for you. Enjoy

About This Instructable

263,226views

74favorites

License:

Bio: I am a retired old geezer with way too much time on my hands for my own good.
More by rbodell:Velcro Cord Wrap SIMPLE USB WEATHERPROOF CAMERA Simple CB base station antenna 
Add instructable to: