Moxon-Principles Dualband-Moxon 10+6 m Moxons 10-15 m Wire-Moxon 17 + 20 m 2-m-Moxon

The DK7ZB-Dualband-Moxon-Beam for 10 m and 6 m

 

One feedpoint with 50 Ohm for both bands!

This Minibeam has for 28 MHz 2/3 of the dimensions of a fullsize-beam and is an open-sleeve-fed 2-El.-Yagi for 50 MHz

Gain 10 m = 4,0 dBd

F/B = 30 dB

Gain 6 m = 4,3 dBd

F/B = 11 dB

 

The Dualband-Beam

built by Aleks, S54S

 

He has bent the corners, very good solution if you can handle this method!

The feeding system of the Moxon by 

Aleks, S54S

 

Aleks has just used the dimensions given on this page, no further adjustments were needed. Mni tnx for the informations, Aleks!

The Dualband-Moxon

built by Marcio, PY2OK

Measured SWR on 10 m:

Measured SWR on 6 m:

Parts

Length

Al-Tubes

3

2x74 cm 2 cm gap

16 x1,5 mm

8

150 cm

16 x1,5 mm

2, 4, 7, 9

117,5 cm

12 x1 mm

1, 5

53,5 cm

12 x1 mm

6, 10

72,5 cm

12 x1 mm

11

283,8 cm

10 x 1 mm

12 296,4 cm 10 x 1 mm

Part

Position

8 (Reflector 10 m)

0 cm

12 (Reflector 6 m)

50 cm

11 (open-sleeve-Radiator 6 m)

125,8 cm

3 (Radiator 10 m)

142 cm

For the connections of the bent ends I use Cu-fittings.

The lengths in the upper table mean the distance from the center of the tubes to the other end.

Pay attention that the middle parts 2, 4, 7, 9 must be longer and can be shifted in the 16-mm-tubes for tuning!

Left:

Balun 2x3 turns of RG188 on FT140-43 for 300 Wtts output

Right:

Balun 2x3 turns ofAircell-5 on FT240-43 for 1 KW output