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Hi all done ! had to work at night and the early morning .To bloody hot here during the day. 4.30 pm and it's still over 100. 5 th el on and swr is good come up as modeled can't really measure the gain difference. The F to b is higher. I can now make a s 8 signal completely vanish off the back .
Did a sweep using my analyzer as a sig gen and placed it about 100 meters away and plotted a polar graph .It came out as predicted by the software so I guess it works. I optimized it for 28.3 but still get 8 db on ch 38 but with a lower f to b.
Work into the states a lot Iv'e got 46 states confirmed on 10 and the west coast is a daily occurrence.
Still think your 2 el boom is too short for direct feed . We are lucky that 2 el's aren't as critical and are fairly easy to get some gain and F to b .
The first parasitic element you add is the best bang for buck you get ,a great place to start 5 db gain or there a bouts. It's a case of diminishing returns For me now to get an other 5db I would need another 7 elements and about an extra 12 meters of boom .So iv'e gone about as far as I can afford. Would love to see how you handle a 2 el portable quad. Hope to catch you on 27 mhz some day. Ps Obama and crew go home today. Thank God ! The extra security has really stuffed Brisbane up.

<blockquote data-quote="vkrules" data-source="post: 502505" data-attributes="member: 24352">Hi all done ! had to work at night and the early morning .To bloody hot here during the day. 4.30 pm and it&#039;s still over 100. 5 th el on and swr is good come up as modeled&nbsp; can&#039;t really&nbsp; measure the&nbsp; gain difference. The&nbsp; F to b is higher. I can now make a s 8 signal completely vanish off the back . Did a sweep using my analyzer as a sig gen and placed it about 100 meters away and plotted a polar graph .It came out as predicted by the software so I guess it works. I optimized it for 28.3 but still get 8 db on ch 38 but with a lower f to b. &nbsp;Work into the states a lot Iv&#039;e got 46 states confirmed on 10 and the west coast is a daily occurrence. &nbsp;Still think your 2 el boom is too short for direct feed . We are lucky that 2 el&#039;s aren&#039;t as critical and are&nbsp; fairly easy to get some gain and&nbsp; F to b&nbsp; . &nbsp;The first parasitic element you add is the best bang for buck you get ,a great place to start 5 db gain or there a bouts.&nbsp; It&#039;s a case of diminishing returns For me now to get an other 5db I would need another 7 elements and about an extra 12 meters of boom .So iv&#039;e gone about as far as I can afford. Would love to see how you handle a 2 el portable quad. Hope to catch you on 27 mhz some day. Ps Obama and crew go home today. Thank God ! The extra security has really stuffed Brisbane up.</blockquote>

[QUOTE="vkrules, post: 502505, member: 24352"] Hi all done ! had to work at night and the early morning .To bloody hot here during the day. 4.30 pm and it's still over 100. 5 th el on and swr is good come up as modeled can't really measure the gain difference. The F to b is higher. I can now make a s 8 signal completely vanish off the back . Did a sweep using my analyzer as a sig gen and placed it about 100 meters away and plotted a polar graph .It came out as predicted by the software so I guess it works. I optimized it for 28.3 but still get 8 db on ch 38 but with a lower f to b. Work into the states a lot Iv'e got 46 states confirmed on 10 and the west coast is a daily occurrence. Still think your 2 el boom is too short for direct feed . We are lucky that 2 el's aren't as critical and are fairly easy to get some gain and F to b . The first parasitic element you add is the best bang for buck you get ,a great place to start 5 db gain or there a bouts. It's a case of diminishing returns For me now to get an other 5db I would need another 7 elements and about an extra 12 meters of boom .So iv'e gone about as far as I can afford. Would love to see how you handle a 2 el portable quad. Hope to catch you on 27 mhz some day. Ps Obama and crew go home today. Thank God ! The extra security has really stuffed Brisbane up. [/QUOTE]

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