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Marconi. I got similar results when I modeled with yagi cad. applied boom correction and used 12 m for element size( I figured that would be about right allowing for element taper) resonance came out lower than ch 1 and swr min about 300 kcs higher. Siro say 27.205 is center frequency. Looking at other models the driven and reflector are to long. Could they have done that to increase bandwidth!, are we missing something? As for boom length ,have a look at a lawson long boom model with a 8 meter boom( twice that of a siro) it's very impressive .

[QUOTE="vkrules, post: 433205, member: 24352"] Marconi. I got similar results when I modeled with yagi cad. applied boom correction and used 12 m for element size( I figured that would be about right allowing for element taper) resonance came out lower than ch 1 and swr min about 300 kcs higher. Siro say 27.205 is center frequency. Looking at other models the driven and reflector are to long. Could they have done that to increase bandwidth!, are we missing something? As for boom length ,have a look at a lawson long boom model with a 8 meter boom( twice that of a siro) it's very impressive . [/QUOTE]

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