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Vortex claim that length for resonance on 27,500,
i imagine using fatter tubes would yield a broader bandwidth, i doubt it would give the increase in gain,

If the radial sleeve has very little radiation making the sigma4 an elevated 1/2wave,
the mk2 Vortex must be an elevated 3/8wave.

i would expect a little lower gain from a 3/8wave, so where is their gain coming from?,

you have them at about the same height, i presume same ground type too,
current maxima is close to the same height with the edge to the older longer vortex,

[QUOTE="bob85, post: 613820, member: 18"] Vortex claim that length for resonance on 27,500, i imagine using fatter tubes would yield a broader bandwidth, i doubt it would give the increase in gain, If the radial sleeve has very little radiation making the sigma4 an elevated 1/2wave, the mk2 Vortex must be an elevated 3/8wave. i would expect a little lower gain from a 3/8wave, so where is their gain coming from?, you have them at about the same height, i presume same ground type too, current maxima is close to the same height with the edge to the older longer vortex, [/QUOTE]

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