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holl_ands | Home > Not For TV - Too Narrowband > Browse:UHF Loop (Parallel-to-Ground) NOT for TVUHF Fractal Pisan-CrossHiVHF+UHF Circular Pancake Loop FakeOmni2-Meter Cubical Quad-1: Howzit for TV?2-Meter Cubical Quad-2: Howzit for TV?V- & H-Polarized X396 FenceYet Another UTube DefectBruce ArraySterba CurtainSix Shooter
Sterba Curtain Sterba Curtains analyzed using 4nec2. Variant1 (1/2 +2/4 wave-lenghts) and Variant2 (2/2 + 2/4 wave-lengths) are described here: http://www.w8ji.com/curtain%20sterba%20USIA%20array.htm Variant3 (3/2 + 2/4 wave-lengths WIDE) is described here: http://www.antennex.com/shack/Jul05/sell.html Although Sterba Curtains provide Raw Gain across most of the New UHF TV Band, frequency range for low SWR is very small for Variant1 and Variant2. Variant3 has slightly better SWR, but only over part of the new UHF band....and is much better at 600-ohms. Hence these are unsuitable for either Hi-VHF or UHF TV Bands due to the need for a tunable matching network. Date(s): 26 July 2009. Album by holl_ands. 1 - 16 of 16 Total. 9446 Visits.
enlarge 0KB, 1024x831 1 Variant1 Bottom Fed Sterba Curtain - 3D View enlarge 0KB, 1024x831 2 Variant2 Bottom CrossFed Sterba Curtain - 3D View enlarge 0KB, 1024x831 3 Variant3 Bottom Fed WIDE Sterba Curtain - 3D View enlarge 0KB, 1024x819 4 Variant1 Bottom Fed Sterba Curtain Raw Gain is Very Narrowband. enlarge 0KB, 1024x819 5 Variant1 Bottom Fed Sterba Curtain SWR (300-ohm) is even more Narrowband. enlarge 0KB, 1024x819 6 Variant1 Bottom Fed Sterba Curtain Impedance enlarge 0KB, 1024x819 7 Variant2 Bottom CrossFed Sterba Curtain Raw Gain only covers half of new UHF Band. enlarge 0KB, 1024x819 8 Variant2 Bottom CrossFed Sterba Curtain SWR (300-ohm) is even more Narrowband. enlarge 0KB, 1024x819 9 Variant2 Bottom CrossFed Sterba Curtain Impedance enlarge 0KB, 1024x819 10 Variant3 Bottom Fed WIDE Sterba Curtain Raw Gain is very Narrowband enlarge 0KB, 1024x819 11 Variant3 Bottom Fed WIDE Sterba Curtain SWR (300-ohm) is even more Narrowband. enlarge 0KB, 1024x819 12 Variant3 Bottom Fed WIDE Sterba Curtain SWR (600-ohm) is much better.... enlarge 0KB, 1024x819 13 Variant3 Bottom Fed WIDE Sterba Curtain Impedance enlarge 24KB, 791x1024 14 Variant1 Bottom Fed Sterba Curtain Example 4nec2 File enlarge 25KB, 791x1024 15 Variant2 Bottom CrossFed Sterba Curtain Example 4nec2 File enlarge 26KB, 791x1024 16 Variant3 Bottom Fed WIDE Sterba Curtain Example 4nec2 File
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