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I wouldn't call it snake oil.
I have/use the IMAX. I run it presently w/o the 'ground plane kit' - but I will be putting it on before Winter gets here. The IMAX will work off of the coax and masting to get a counterpoise. But it is better to use the 'gpk' to minimize the common-mode current as well as improve the radiation pattern.

On of the guys on the forum has modified the IMAX using a ground plane kit from the Maco 5/8 and added a 102 inch steel whip to the top section.

This antenna has proven to be remarkable modded or stock - able to use between 10 to 12m w/o using a tuner - and is also able to use 15m and 17m in addition with a tuner. For $100, I consider it a marvel of cheap engineering. Many people that own and use them can and have compared them to their 5/8 wave stand-by antenna. So much so, that even Sirio has figured this out and has made an IMAX copy - just to cash into the IMAX market. They ('Sirio') obviously have realized the virtues of this design and can see that enough people buy them because they just flat out work well enough. . .

<blockquote data-quote="Robb" data-source="post: 232227" data-attributes="member: 8446">I wouldn&#039;t call it snake oil.I have/use the IMAX.&nbsp; I run it presently w/o the &#039;ground plane kit&#039; - but I will be putting it on before Winter gets here.&nbsp; The IMAX will work off of the coax and masting to get a counterpoise.&nbsp; But it is better to use the &#039;gpk&#039; to&nbsp; minimize the common-mode current as well as improve the radiation pattern.&nbsp; On of the guys on the forum has modified the IMAX using a ground plane kit from the Maco 5/8 and added a 102 inch steel whip to the top section.&nbsp; This antenna has proven to be remarkable modded or stock - able to use between 10 to 12m w/o using a tuner - and is also able to use 15m and 17m in addition with a tuner.&nbsp; For $100, I consider it a marvel of cheap engineering.&nbsp; Many people that own and use them can and have compared them to their 5/8 wave stand-by antenna.&nbsp;&nbsp; So much so, that even Sirio has figured this out and has made an IMAX copy - just to cash into the IMAX market.&nbsp; They (&#039;Sirio&#039;) obviously have realized the virtues of this design and can see that enough people buy them because they just flat out work well enough. . .<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:" /></blockquote>

[QUOTE="Robb, post: 232227, member: 8446"] I wouldn't call it snake oil. I have/use the IMAX. I run it presently w/o the 'ground plane kit' - but I will be putting it on before Winter gets here. The IMAX will work off of the coax and masting to get a counterpoise. But it is better to use the 'gpk' to minimize the common-mode current as well as improve the radiation pattern. On of the guys on the forum has modified the IMAX using a ground plane kit from the Maco 5/8 and added a 102 inch steel whip to the top section. This antenna has proven to be remarkable modded or stock - able to use between 10 to 12m w/o using a tuner - and is also able to use 15m and 17m in addition with a tuner. For $100, I consider it a marvel of cheap engineering. Many people that own and use them can and have compared them to their 5/8 wave stand-by antenna. So much so, that even Sirio has figured this out and has made an IMAX copy - just to cash into the IMAX market. They ('Sirio') obviously have realized the virtues of this design and can see that enough people buy them because they just flat out work well enough. . . :whistle: [/QUOTE]

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