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If you were to put a 50 ohm dummy load on the end of your coax that fits into the antenna you will probably see a low swr anywhere on your coax.
Your results tell us that you have not tuned your antenna to 50 ohms or anywhere close so it will not be working as well as it should.
Thus a retune is required.
Not much skip about yet so now is the time to do it!
That is why the SWR on your IMax does not change much when you add the amp or additional coax. It is factory tuned to 50 ohms.

[QUOTE="magnuman, post: 773318, member: 12583"] If you were to put a 50 ohm dummy load on the end of your coax that fits into the antenna you will probably see a low swr anywhere on your coax. Your results tell us that you have not tuned your antenna to 50 ohms or anywhere close so it will not be working as well as it should. Thus a retune is required. Not much skip about yet so now is the time to do it! That is why the SWR on your IMax does not change much when you add the amp or additional coax. It is factory tuned to 50 ohms. [/QUOTE]

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