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i know there's some fans of the sigma 4/v4k here and thought ya'll might be interested in the replies i got on my thread about mine over at eham . on the 3rd page a guy pops up saying .....

"I was an engineer at Avanti when the Sigma IV design was being built. It's a J pole- nothing more and nothing less. No magic, "

and ....

"It's an end fed half wave- so same gain as a dipole IF you can keep radiation currents off the mast and the outside of the coax- this is the downfall of all of the groundplanes, J poles etc. "

http://www.eham.net/ehamforum/smf/index.php/topic,75921.0.html

so they have the same gain as a dipole . i wonder where his engineering degree came from ..... and if hes padding his resume .
seems the often quoted and seemingly revered W8JI is not a fan either . oh well .........

<blockquote data-quote="BOOTY MONSTER" data-source="post: 332982">i know there&#039;s some fans of the sigma 4/v4k here and thought ya&#039;ll might be interested in the replies i got on my thread about mine over at eham . on the 3rd page a guy pops up saying .....&quot;I was an engineer at Avanti when the Sigma IV design was being built. It&#039;s a J pole- nothing more and nothing less. No magic, &quot; and ....&quot;It&#039;s an end fed half wave- so same gain as a dipole IF you can keep radiation currents off the mast and the outside of the coax- this is the downfall of all of the groundplanes, J poles etc. &quot;<a href="http://www.eham.net/ehamforum/smf/index.php/topic,75921.0.html" target="_blank">http://www.eham.net/ehamforum/smf/index.php/topic,75921.0.html</a>so they have the same gain as a dipole <img src="https://cdn.jsdelivr.net/joypixels/assets/8.0/png/unicode/64/1f617.png" class="smilie smilie--emoji" loading="lazy" width="64" height="64" alt=":whistle:" title="Whistling&nbsp; &nbsp; :whistle:"&nbsp; data-smilie="29"data-shortname=":whistle:" /> . i wonder where his engineering degree came from ..... and if hes padding his resume .<img src="https://cdn.jsdelivr.net/joypixels/assets/8.0/png/unicode/64/1f615.png" class="smilie smilie--emoji" loading="lazy" width="64" height="64" alt=":confused:" title="Confused&nbsp; &nbsp; :confused:"&nbsp; data-smilie="5"data-shortname=":confused:" />seems the often quoted and seemingly revered W8JI is not a fan either . oh well .........&nbsp; <img src="https://cdn.jsdelivr.net/joypixels/assets/8.0/png/unicode/64/1f606.png" class="smilie smilie--emoji" loading="lazy" width="64" height="64" alt=":lol:" title="Laugh&nbsp; &nbsp; :lol:"&nbsp; data-smilie="19"data-shortname=":lol:" /></blockquote>

[QUOTE="BOOTY MONSTER, post: 332982"] i know there's some fans of the sigma 4/v4k here and thought ya'll might be interested in the replies i got on my thread about mine over at eham . on the 3rd page a guy pops up saying ..... "I was an engineer at Avanti when the Sigma IV design was being built. It's a J pole- nothing more and nothing less. No magic, " and .... "It's an end fed half wave- so same gain as a dipole IF you can keep radiation currents off the mast and the outside of the coax- this is the downfall of all of the groundplanes, J poles etc. " [url]http://www.eham.net/ehamforum/smf/index.php/topic,75921.0.html[/url] so they have the same gain as a dipole :whistle: . i wonder where his engineering degree came from ..... and if hes padding his resume .:confused: seems the often quoted and seemingly revered W8JI is not a fan either . oh well ......... :lol: [/QUOTE]

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