Homemade TV Antenna
Intro: Homemade TV Antenna
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.
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.
STEP 2: Step 2
Take a 1/2 or 3/4 inch PVC cross (depending if you used 3/8 or 1/2 inch copper tubing). add a piece of PVC to each connection so you can bolt the flattened edges to two of the PVC ends and the middle will fit into a notch to support it. Notice the two pieces of copper tubing do NOT come into electrical contact with each other except for the 300 ohm matching transformer.
Bolt the cross to a 2" PVBC end cap. Use a lock washer or double nuts so it doesn't loosen up. Glue the cap to a 20 foot piece of 2" PVC pipe.
Connect a 300 ohm matching transformer to the two pieced of copper tubing as in the picture. Connect cable to transformer, tape and run down the 2" PVC pole.
Drive a piece of pipe in t ground with about a foot above the ground and set the antenna mast over it and firmly mount the mast at roof level. As long as you mount it at the edge of the roof and don't go over 20 feet you don't need guy wires. if you go higher I would suggest adding some guy wires.
Trees between you and the station could reduce the signal so you may have to go above trees for log distance stations.
If you use a metal pole, it should be grounded to the ground rod by your electric meter.
Bolt the cross to a 2" PVBC end cap. Use a lock washer or double nuts so it doesn't loosen up. Glue the cap to a 20 foot piece of 2" PVC pipe.
Connect a 300 ohm matching transformer to the two pieced of copper tubing as in the picture. Connect cable to transformer, tape and run down the 2" PVC pole.
Drive a piece of pipe in t ground with about a foot above the ground and set the antenna mast over it and firmly mount the mast at roof level. As long as you mount it at the edge of the roof and don't go over 20 feet you don't need guy wires. if you go higher I would suggest adding some guy wires.
Trees between you and the station could reduce the signal so you may have to go above trees for log distance stations.
If you use a metal pole, it should be grounded to the ground rod by your electric meter.
177 Comments
Mizark20 3 years ago
lshaffer1 3 years ago
r1100ra 5 months ago
xsie 2 years ago
ayreeshdeecy 11 months ago
flyznest 1 year ago
I build them with just a single piece of PVC, instead of a cross... they've held up to monsoon winds with no issues. I found good quality outdoor sealed transformers on amazon.. that makes a noticeable difference.. I was originally using transformers I found at garage sales and thrift stores but after cutting a few open I noticed that some of them don't actually have a transformer in them... they just connect the f connector to the twinlead, directly. The ones with transformers do make a difference. I noticed in an older installation that getting a minimum of 6' over the top of the roof makes an enormous difference. I was not able to do that in my most recent location... but its still performing better than any commercially built antenna I've tried.
I have not tried a distribution amplifier on this antenna, yet. I only have one TV in this house that I use, so there's no point. I've put one on commercial antennas at other peoples homes and they seem to really work, so presumably with this antenna and a distribution amp you could get tv all over the house. I have not tried an LTE filter, either.
Ive noticed that this antenna does have a reception pattern. The ends of the copper are dead spots. the broad sides have reception... so, with my construction, you wind up having these fairly narrow dead notches 180 degrees out from eachother at each end of the PVC.. I aim those notches in the direction where there are no towers. At my house I have towers at 15, 180, and 270 degrees... so I aim the notches at 320 and 140 degrees.
1964terryaustin 2 years ago
But in the origanal post says not to let the ends of the tubing electraly touch.
I have a bent aluminum rim would this work and would i need to clear the coating off of them?
Mantree91 1 year ago
tpmccallion 2 years ago
dgwatson5 10 years ago
Check out my variation on the present design. They both work well from inside the house. Outside function should be great.
LarryF24 5 years ago
dgwatson5 1 year ago
rbodell 10 years ago
Great, thanks. If it works out do an instructible and put a link to it here. You might experiment with the spacing between the two rings. That could affect the operation some.
tpmccallion 2 years ago
rbodell 3 years ago
Arcadeva 3 years ago
Elangoj 3 years ago
1) Could this be used for FM radio reception at 98MHz?
2) How to calculate length of tube? i.e formula to calculate.
Thanks.
rbodell 3 years ago
https://www.instructables.com/community/How-do-you...
Elangoj 3 years ago
Noted.
Thank you for your reply. Let me try out something similar at my home. Thanks again.
bigdaddyjkttcs 3 years ago
I guess I’ll find out, lol.. I’m about to give it a go!!