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Friday, October 29, 2010
Wednesday, October 20, 2010
DV4080 HF VERTICAL 40M/80M DUAL BAND
Type : HF Vertical
Resonance Freq : 7.08MHz & 3.85MHz
SWR : <1.7
(tested on a Single Radial on each band not trim)
Resonance Freq : 7.08MHz & 3.85MHz
SWR : <1.7
(tested on a Single Radial on each band not trim)
total height : 10m
freq : 40M and 80M
Power rating : 200W PEP Max
Sunday, October 17, 2010
D3E20 3 element yagi for 20m band
Type : 3 element yagi
Resonance Freq : 20m band
Center Freq : 14.200 MHz
SWR : Less than 1:1.2
Gain : 5.35 dBd / 7.5 dBi
F/B Ratio : 25 dB
Weight : less than 15Kg
Boom Length : 5.6 meter
D1E1740 Dual-band Rotary Dipole.
Type of antenna : rotary dipole
Resonance Freq : 17m and 40m dual band
Center Freq : 7.070MHz and 18.100MHz
SWR: less than 1:1.2
Total weight : less than 5 Kg
Total Length : 15 meter (End to end)
The rotary dipole was
under the 4 element yagi ,
no guy wire needed .
Coil made from 3mm aluminium wire ,
13 uH per coil.
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