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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 |
| 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
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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 |
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The Dualband-Moxon built by Marcio, PY2OK |
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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 |
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For the connections of the bended 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!
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Left:
Balun 2x3 turns of RG188 on FT140-43 for 300 Wtts output Right: Balun 2x3 turns ofAircell-5 on FT140-43 for 1 KW output |
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