10 through 40 Meter
The antenna when I finally got done it was total length of 34 feet . (Some what a Clone of the Zero-5 Antenna.
Tried shorter ones that another ham built, but could only use part 40 and nothing on 80 meter
At present have log over 2650 contacts with this antenna. year was 2010
Check my log book updated daily.log_book.html
End results antenna is been up over a year no problems and no maintains at all . SWR has never changed but I do use a tuner on 40 . Bands 10,12,15,20,and 30 no tuner is needed. Also have ran up to 1 Kw through the Unun with no problems. I use four guide ropes about 1/2 way up and then 3/4 way up, these are 1/8 inch nylon rope.
All parts are from Home Depot the mask is made from conduit that is slid inside one another held with hose clamps between the section.
Here are the pictures of the base. I uses a counter poise wires at different length all are ¼ wave per band. I used 2 wires per band, the wire is copper bare. 060 diameters.
The base plate is ¾ inch ply wood painter both side at each corner are dry wall screw. Then I attached bare copper wire as seen in Picture
Next drilled a 1-1/8 inch hole through the center of the plywood.
Bottom section of the antenna has a insulator slid inside the antenna see picture
I installed a piece of rebar 3 ft long in center of the plate see picture . The antenna it self sits on top of the ply wood, the antenna does not come in contact with the ground
I then installed 16 ground wires and check the receive from several beacon's through out the world. It had improved the receive. I then installed some more all cut to between a 1/4 and a 1/8 wave.
When I got up to 18 wires it was getting better ended up 32 wires at that point nothing improved so I stop.
I was glad to didn't get any better ran out of room I live in a mobile home park
Your ground radial system is the most important part of vertical antenna performance. When
installing ground-mounted radials use radial lengths between 20 and 43 feet, with 43 foot being
the choice for best performance. If you have to use shorter length radials, put more down. A good
place to start is a minimum of 32 with 120 being the best. When choosing radial wire, #14
insulated stranded wire should be used. You can buy it at Home Depot or most local hardware
stores. When installing radials on a ground-mounted vertical, they do not have to be cut to
resonance. Only when using elevated radials isolated from ground do the radials need to be cut
to length for the various bands. A radial plate should be used and all connections soldered and
coated with liquid electrical tape. These are just some guidelines. Just get as many radials down as you can, each as long as you can make it.
The antenna is feed at the base. A 4 to 1 Unun by Balun Design
I used a model 4134t if I was buying another one I would buy the 4134s
because of the mounting studs are on the sides this would kept water out of the box.
Wire connected at the top Unun Feeds the antenna and ground Circuit. At bottom Unun coax is feed back to the shack
And the antenna
Cost $46.00 for materials and the Unun cost $79.95 total cost $125.95
Web link for the Unun Balundesigns.com
Zero 5 Antenna $289.00