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Tech Head - The Technology Section
SDR radio, Software Defined Radio
My go at WXSAT
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<blockquote data-quote="Terryl" data-source="post: 1046854" data-attributes="member: 369937"><p>Is that a metal roof on top of the building I see in that photo?? That can affect things a bit.</p><p></p><p>And on that antenna design, I cant put together the correct combination of numbers you posted to equal a 1/4, 1/2, 5/8 or 3/4 wave antenna for 137.5 MHz.</p><p></p><p>2181.81 MM is a full wavelength for the center frequency of 137.5 MHz, you divide that by 2 or 4 to get the 1/2 or 1/4 wavelength needed for the antenna.</p><p></p><p>Full wave = 2181.81 MM</p><p>1/2 wave = 1090.90 MM</p><p>1/4 wave = 545.45 MM</p><p></p><p>My question is what combination of those numbers did you use to make up one set of radials?</p></blockquote><p></p>
[QUOTE="Terryl, post: 1046854, member: 369937"] Is that a metal roof on top of the building I see in that photo?? That can affect things a bit. And on that antenna design, I cant put together the correct combination of numbers you posted to equal a 1/4, 1/2, 5/8 or 3/4 wave antenna for 137.5 MHz. 2181.81 MM is a full wavelength for the center frequency of 137.5 MHz, you divide that by 2 or 4 to get the 1/2 or 1/4 wavelength needed for the antenna. Full wave = 2181.81 MM 1/2 wave = 1090.90 MM 1/4 wave = 545.45 MM My question is what combination of those numbers did you use to make up one set of radials? [/QUOTE]
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