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Homer, The dimensions are all based on achieving a 1/4 electrical wavelength in the cone structure that physically lines up with the bottom 1/4 wave on the main radiator. Both EZNEC and CST demonstrate peak gain occurs when this condition is met. CST does the most dramatic job of displaying this when you see both of these currents reaching 90 degrees or 1/4 wavelength but you can see this affect with EZNEC too.

[QUOTE="Shockwave, post: 385004, member: 10882"] Homer, The dimensions are all based on achieving a 1/4 electrical wavelength in the cone structure that physically lines up with the bottom 1/4 wave on the main radiator. Both EZNEC and CST demonstrate peak gain occurs when this condition is met. CST does the most dramatic job of displaying this when you see both of these currents reaching 90 degrees or 1/4 wavelength but you can see this affect with EZNEC too. [/QUOTE]

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