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1. #Homemade double biquad wifi antenna with copper pipe mod
2. #Homemade double biquad wifi antenna with copper pipe code
3. #Homemade double biquad wifi antenna with copper pipe crack

This helped the SWR out a bit on the MURS band (151 and 154 MHz), since I go up there to chat with some non ham friends.

I shortened the dipoles by about 1/4" on each leg, and left the gamma match the same. The build was simple and fast, and the performance is very good so far. I built a phased array using four of your dipoles.

I'm mounting it on my roof today to serve as the antenna for my APRS I-Gate.Ĥ Dipole Array Built by Adam KB9VLR - 9/2007 - Original Message. I also made the inner tube somewhat longer than you had spec'd for the brass tube, simply so the antenna cable wouldn't be flopping around in the larger outer tube. It's a good fit only if the tubes are dead straight - since they're flexible, they usually aren't. I did have to grind down the inner tube somewhat to make it slide easily.

#Homemade double biquad wifi antenna with copper pipe mod

Yes, I did the mod because I didn't have access to the brass you suggested. I modified the gamma match a little by using a 5/16 tube with a 3/16 tube on the inside. Reception and transmission are comparable to similar commercial antennas I've used. VSWR measures under 1.5 between 136 and 154 mhz. When I finally got an SWR meter, it shows 1.1 to 1 on 146.955 (my primary repeater), and doesn't hit 1.3 to 1 on either end of the band!! When I took it down to mount it on my main tower, I just made sure it was sealed reasonably well and up it went. I didn't have an SWR meter to check it, so I never tried to tune it. The most astounding thing about the Plumbers' Dipole is that I built it according to what is on your site, mounted it, and started using it.

#Homemade double biquad wifi antenna with copper pipe crack

I'm going to take a crack at the Extra exam in December.

#Homemade double biquad wifi antenna with copper pipe code

I passed code and General theory in October so I bought a Kenwood TS-530S so I can play on HF for the winter. It is underneath a G5RV which is my only other antenna on the tower for the moment. Sorry I'm so late getting pictures back to you - I waited until I finally got the antenna up on 50 feet of tower (today!) and took some shots. Many thanks! That was a nice easy project and the directions were great!" Eventually I'll cough up the $$ for a good HF rig. I have a 10 meter wire dipole up now connected to a Radio Shack HTX100 so I can listen to 10 meter CW in preparation for my code and General exams in October. Next step for me is a 10 meter antenna - I haven't decided what to build yet. I picked up 60feet of used and mildly corroded (but still solid) 15g and am currently in process of sanding and painting before I dig a hole and mount it permanently. It is temporarily mounted at 19ft on 2 sections of Rohn 15G tower that is bracketed to my garage. I am a brand new ham and your dipole has become my first fixed antenna. I just wanted to drop you a note and thank you for the plans for the dipole antenna. I've enclosed his email below so you can see his comments. As a new ham he was looking for something easy to build and that would work. These three photos come from Bill Kuhn KC0NYL in Saint Marys, KS who found this web page and decided to build the dipole. If you build one of these antennas I'd love to hear from you and see pictures of your work. If you want to go that far I might be able to give you hints but you're on your own after that. They worked great but were VERY long and the phasing harness was a bear to build and install. I built 8 dipoles and did put all 8 up in phase. Stacking distance is just under 39 inches tip to tip so a pair of dipoles will be about 12 feet long. Each time you double the number of dipoles you increase the gain in the favored direction by about 3 db but the amount of work that goes into the phasing harness and the losses might make it undesirable to stack more than 2 or 4. You can use more than one by stacking them vertically and feeding them in phase. The angle of radiation is lower than that of a ground plane so it does tend to work better (by about 3db in the favored direction). One of these dipoles works fine for a basic, slightly off center, omni-directional antenna. These dipoles are the result of that effort and do a good job. The design I wanted was something that was grounded to help prevent static buildup problems, was easy to build and could be duplicated over and over without redesign. I was looking for an antenna design for a repeater antenna. Copper Plumbing Pipe Dipole Antenna for 2 Metersĭuring the late 1980's I worked up the design for these dipoles during a vacation week at home.