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The solution for the clueless or lazy. RF grounding must be done at the antenna, not the shack.You're still getting all the common mode coming down the coax and mixing with the wanted signal. Lightning protection must be done at the antenna and before the feeder enters the shack. The only station ground you need is an electrical safety ground.

Then there is something wrong with your installation. On my Imax 2000 I took it out of the box, never touched the tuning rings and just stuck it up in the air. 16ft pole or 21ft pole, RF choke or no RF choke the SWR stayed the same. The only thing that changed was a drop in TVI with a RF choke in place.

[QUOTE="M0GVZ, post: 552223, member: 22312"] The solution for the clueless or lazy. RF grounding must be done at the antenna, not the shack.You're still getting all the common mode coming down the coax and mixing with the wanted signal. Lightning protection must be done at the antenna and before the feeder enters the shack. The only station ground you need is an electrical safety ground. Then there is something wrong with your installation. On my Imax 2000 I took it out of the box, never touched the tuning rings and just stuck it up in the air. 16ft pole or 21ft pole, RF choke or no RF choke the SWR stayed the same. The only thing that changed was a drop in TVI with a RF choke in place. [/QUOTE]

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