You can now help support WorldwideDX when you shop on Amazon at no additional cost to you! Simply follow this Shop on Amazon link first and a portion of any purchase is sent to WorldwideDX to help with site costs.
The Feb 2025 Radioddity Giveaway Results are In! Click Here to see who won!

Reply to thread

Message

Do you think it is simply a variation of the Sigma/Vector antenna. Obvious differences are the coils, the matching coil/network on the bottom (is it tapped?), and the closed top on the basket. Less obvious is in the full 5/8 radiator over the 1/4 wave basket. Overall it is 7/8 wavelength long. Am I way off thinking the coil above the basket was added to work a match on the 5/8 radiator above because the closed basket design isolated the lower 1/4 wave section from interaction with the upper radiator (I told you I'm not very techie on this stuff)?

Clearly the basket doesn't replace horizontal GP seeing those on the bottom are 105" long. So did this basket not improve the horizontal radiation in the way the "V" shaped one on the V4k is believed to do?

Does the basket capture out-of-phase radiation? and what difference would it make if there is separate matching done above the basket for the upper 5/8 radiator, and if a full-sized GP below it all is required to correct TOA issues. Is this antenna self-contradictory?

Is the basket just an over-sized matching network interrupting the top and bottom halves of the coil and not really anything but a real big 5/8 wave?

What a deal. I wish some one smarter would ask the questions I don't even know how to ask.

<blockquote data-quote="HomerBB" data-source="post: 262041" data-attributes="member: 8569">Do you think it is simply a variation of the Sigma/Vector antenna. Obvious differences are the coils, the matching coil/network on the bottom (is it tapped?), and the closed top on the basket. Less obvious is in the full 5/8 radiator over the 1/4 wave basket. Overall it is 7/8 wavelength long. Am I way off thinking the coil above the basket was added to work a match on the 5/8 radiator above because the closed basket design isolated the lower 1/4 wave section from interaction with the upper radiator (I told you I&#039;m not very techie on this stuff)?Clearly the basket doesn&#039;t replace horizontal GP seeing those on the bottom are 105&quot; long. So did this basket not improve the horizontal radiation in the way the &quot;V&quot; shaped one on the V4k is believed to do? Does the basket capture out-of-phase radiation? and what difference would it make if there is separate matching done above the basket for the upper 5/8 radiator, and if a full-sized GP below it all is required to correct TOA issues. Is this antenna self-contradictory?Is the basket just an over-sized matching network interrupting the top and bottom halves of the coil and not really anything but a real big 5/8 wave?What a deal. I wish some one smarter would ask the questions I don&#039;t even know how to ask.</blockquote>

[QUOTE="HomerBB, post: 262041, member: 8569"] Do you think it is simply a variation of the Sigma/Vector antenna. Obvious differences are the coils, the matching coil/network on the bottom (is it tapped?), and the closed top on the basket. Less obvious is in the full 5/8 radiator over the 1/4 wave basket. Overall it is 7/8 wavelength long. Am I way off thinking the coil above the basket was added to work a match on the 5/8 radiator above because the closed basket design isolated the lower 1/4 wave section from interaction with the upper radiator (I told you I'm not very techie on this stuff)? Clearly the basket doesn't replace horizontal GP seeing those on the bottom are 105" long. So did this basket not improve the horizontal radiation in the way the "V" shaped one on the V4k is believed to do? Does the basket capture out-of-phase radiation? and what difference would it make if there is separate matching done above the basket for the upper 5/8 radiator, and if a full-sized GP below it all is required to correct TOA issues. Is this antenna self-contradictory? Is the basket just an over-sized matching network interrupting the top and bottom halves of the coil and not really anything but a real big 5/8 wave? What a deal. I wish some one smarter would ask the questions I don't even know how to ask. [/QUOTE]

Top Bottom