Wireman-J-Poles

The Vertical Sloping Dipole

The CE0Y-7-m-Triple-Leg

Vertical 2x7m-Double-Zepp

The Battle-Creek-Special

The vertical polarized 2x7m-Double-Zepp-Antenna

The vertical Double-Zepp 2x7 m is a very simple, effective 8-Band-antenna. The end of the Dipol must be 5-10 m above the ground. My antenna had the feeding point in 13 m above the ground, the diagrams are for this mounting. Is the end to close to the ground, the pattern has a higher radiation angle.

The antenna was fed with 450-Ohm-Wireman-cable. You must have an antenna-tuner for the matching of the system. I used the SG-239 for all bands from 10-80 m and about 9 m Wireman to the roof of my house.

You can use a wooden pole for support or a high tree. 

Unfortunatly the hurricane "Kyrill" in February 2007 broke my 18 m high pine-tree with the vertical before I could take a photo shot. All other antennas survived the storm without any damage.

The support for the upper wire was a glassfibre windsurfing boom with 4,50 m and a 10 m long fishing rod.

Gain and the angle of the radiation:

Band

10 m

12 m

15 m

17 m

20 m

30 m

40 m

80 m

Gain

2,7 dBd

2,91 dBd

1,51 dBd

0,38 dBd

-0,8 dBd

-1,51 dBd

-2,13 dBd

-1,85 dBd

Angle

8

9

10

11

12

14

17

22

The following diagrams are for a real ground with a medium resistance, plotted with EZNEC v. 5+ from W7EL.

10-m-Band

The antenna is longer than 2x5/8-Lambda, therefore it has a second lobe with 70.

Gain: 2,7 dBd at 8

12-m-Band

Here is the length 2x5/8-Lambda and an excellent pattern is the result.

Gain: 2,91 dBd at 9

15-m-Band

Gain: 1,51 dBd at 10

 

17-m-Band

 Gain: 0,38dBd at 11

 

20-m-Band

Gain: -0,8 dBd at 12

 

30-m-Band

Gain: -1,51 dBd at 14

 

40-m-Band

Gain: -2,13 dBd at 17

 

80-m-Band

Gain: -1,85 dBd at 22

On 80m are some losses in the Wireman-cable, because the feedpoint impedance on 3,6 MHz  is very low (9 - j 1150 Ohm).

  But you must try it out.