The Electronics Universe
Over The Air => Antennas and Towers => Topic started by: KC4UMO on February 15, 2008, 06:00:50 PM
-
Was not much going on at home today. So I was in the shack on 20 meters.
And looking at my home brew 6 meter rig when it dawned on me.
I need a good antenna for this.
So I grabbed my calculator, tape measure and a pile of tubing.
Did this on the fly. Just wanted to see what I could come up with.
Sort of an old school antenna.
The elements are from old cb antennas. The clamps are from a discount store. The aluminum angle pieces came from exess door frames.
Boom- 1 1/2 X 16
Elements- 5\' X 3/4 with tapered down tubes.
Ref= 115 1/2 in
Driven= 111 in
D1 = 106 1/2 in
D2 = 102 in
D3 = 97 1/2 in
D4 = 93 in
Spacing is 34 1/2 inches all but the last director. It is 45 inches.
Feed: Gamma Match
Tube is 14 inches.
Center conductor from RG-8 is 15 inches.
Gamma is made but not yet installed.
Will install in the morning and start testing
-
And the finished product.
Mounted about 4.5 feet above the homebrew 10 meter beam.
Now the wait for a band opening!
-
I hope you are grounding it all as you go. Man that is such a lightning target, I hate to see you get hit again, and lose it all. Pray for the best.
-
Nice design Buddy, the next thing to do would be to put up a ground if you haven\'t. Either that or make sure your coax\'s in the station are disconnected when it\'s not in use!