Welcome on the HB9FBO Cubical Quad Antenna Pictures page.
Click on the picture to enlarge.
Click on the picture below to see 2 slide show made by VU2WAP. Thank you Miku!
Somes pictures 2003 winter snow time, click on the pic. to enlarge.
Maintenance of the Quad summer 2003, click on the picture to enlarge.
Antenna height (boom): 27 meters (89’) above the ground.
40 meters, 2 elements, gain 5,6 dbd, F/B 32 db @ 7.050 Mhz.
20 meters, 4 elements, gain 7,8 dbd, F/B 27 db @ 14.200 Mhz
15 meters, 4 elements, gain 8,2 dbd, F/B 26 db @ 21.250 Mhz.
10 meters, 4 elements, gain 8,6 dbd, F/B 22 db @ 28.400 Mhz.
Note: the gain (dbd) is releded to a dipole antenna on the same hight.
Feedlines: direct 50 ohm coax cable on 20 and 15 meters. Matching with quarter wave (electrical length) 75 ohm on 40 and 10 meters. On each feed point I’m using a ferrite core balun.
Note: the PKW Antenna sell this antenna with 4 gamma match feed system, 2 coax.
Boom lengh: 12 meters (39’) including extentions for the rope support.
Weight: 150 Kg (the antenna only) (330 Lb). Quad, mast, rotator and “tower-cage” 280 Kg (610 Lb).
For more infos about the antenna see: PKW Antenna
The Tower characteristics:
Hight: 15 meters (49’). Side: 50 cm (20”).
For more tower details see: Hummel-Al Tower
For more information about many types of quads antennas projects and others antennas models see the W4RNL web side: Antenna, Service and Education
For more information please contact me via E mail.
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