6 Meter Attic Dipole
The ocf antenna gives lower swr with wider bandwidth over more bands than the small length center fed dipole.
6 meter attic dipole. But over the past few years the only antenna i had was the vertical. Click here for detail explanation of how the ocf dipole works. 1 i concocted a way to overcome these restrictions and with considerable effort was able to erect an antenna in the tight confines of my attic 35 feet above the ground. Center connector accepts your pl 259 male connector.
The infamous attic dipole. I do miss having an antenna analyser that works at vhf. Now with many years of 6 meter activity in my. Signal concentration is perpendicular to the wire.
The kb9vbr 2 meter j pole antenna is 69 inches tall overall. Sign up for newsletter. If metal pipe support is used don t short either side of the dipole to it. The better your antenna the more success you will have making contacts.
If the top of the antenna touches the walls or roof the performance may be affected slightly. The 10 meter and 6 meter ham bands. Did some slight adjustments to the length and we re now all set to compare the vertical dipole i m currently using and the horizontal dipole in the attic. In the june 2008 issue of cq magazine i wrote about the difficulties of getting on 6 meters while living with covenant restrictions cc r prohibiting antennas.
Leave up during wind and or thunderstorm. You will need a peak in your attic that is tall enough for the antenna to fit. 10n6rdb antenna in the pictures the bottom horizontal aluminum tubing is a half wave dipole tuned to 10 meters that is all set to be fed with your 50 ohm coax. This added to my hf contest capabilities.
In 2011 i purchased a cushcraft ma6v vertical that covers 20 to 6 meters. I built the dipole and did some testing using my k3 s built in swr meter. Use string and or included zip ties to string up each end. That would have proven very helpful in tuning the.
The slick six 6 meter dipole can be supported from good solid pvc pipe at the center using u bolts fastened over the pipe thru the center insulator or you could use metal pipe and adjust the length to fit your mounting configuration. The frequency devices 10n6rdb take the half wave dipole a step further by working on two bands with one feed line. If you attic isn t tall enough you could angle the antenna mounting to make it fit. Inside the box is a 50 ohm 1 1 balun.
See swr plot for center vs. Mac af4ps fp 51 note. Each leg is about 50 inches. Remember the ocf dipole has an impedance of 200 to 300 ohms so you will need a 4 1 or 6 1 balun if you do not use a remote auto tuner.
I avoided using this antenna on six since at first i had the dipole and later a moxon followed by a 3 element yagi.