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Always use a RF choke. The antenna system will decide whether to use the yagi as a ground plane or the mast or the coax depending on which it sees as the easier route for any RF current to flow down at the frequency you're on. We use a RF choke to ensure it isn't the coax with all the problems that presents.

[QUOTE="M0GVZ, post: 734521, member: 22312"] Always use a RF choke. The antenna system will decide whether to use the yagi as a ground plane or the mast or the coax depending on which it sees as the easier route for any RF current to flow down at the frequency you're on. We use a RF choke to ensure it isn't the coax with all the problems that presents. [/QUOTE]

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