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GA,
You may wish to consider the Size and Spacing parameters of a T2FD Antenna as a guide in determining whether as the "Design" Frequency effects the Spacing between the Turns as the Frequency gets Higher or Lower * The Formulas for Calculating T2FD Dimensions are as follows. http://www.hard-core-dx.com/nordicdx.../t2design.html Generally the Distance between the Turns {Spacing} will get Wider as the Frequency gets lower. - But you already knew that ![]() T2FD -- The Forgotten Antenna -by- Guy Atkins http://www.hard-core-dx.com/nordicdx...wire/t2fd.html I would think that starting with the Sixty Feet Single Turn WellBrook ALA100 Loop Antenna that the progression form One to Two Turns to Three Turns . . . would require increased spacing for each added turn to maintain a certain band width. One-Turn with Sixty Feet Perimeter with 15 Feet per Side of a Square/Diamond. - - - Resulting in a Very Thin Loop Antenna that is about 22-Feet Top-to-Bottom and Side-to-Side. Two-Turns about Four Inch Spacing with Thirty Feet Perimeter with 7.5 Feet per Side of a Square/Diamond. - - - Resulting in a Three Inch Thick Loop Antenna that is about 11-Feet Top-to-Bottom and Side-to-Side. Three-Turns about Six Inch Spacing with Twenty Feet Perimeter with 5 Feet per Side of a Square/Diamond. - - - Resulting in an 12-Inch Thick Loop Antenna that is about Seven Feet Top-to-Bottom and Side-to-Side. Four-Turns about Eight Inch Spacing with Fifteen Feet Perimeter with 3.75 Feet per Side of a Square/Diamond. - - - Resulting in an 24-Inch Thick Loop Antenna that is about 6 Feet Top-to-Bottom and Side-to-Side. The smaller more maneuverable Loop Antenna becomes increasingly Thinker in order to maintain the same Band-Width for the Loop. at least that is the way i envision them -iane ~ RHF |
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