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Since the cone also drives the top section of the vector, changing its length not only changes the wavelength on the outside of the cone, it changes the delay feeding the top section of the main radiator too. Adjusting the length of both can focus the radiation beam above or below the horizon. That "non apparent collinear effect" can also compress the beam directly on the horizon.

[QUOTE="Shockwave, post: 663681, member: 10882"] Since the cone also drives the top section of the vector, changing its length not only changes the wavelength on the outside of the cone, it changes the delay feeding the top section of the main radiator too. Adjusting the length of both can focus the radiation beam above or below the horizon. That "non apparent collinear effect" can also compress the beam directly on the horizon. [/QUOTE]

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