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Not the charts I was looking at in the ARRL book. They cover both ground and elevated. I know the OP was talking about elevated, not ground mounted.

You misunderstand. The shortening of the vertical element has to be done as a result of the improved efficiency of the RF ground. And funnily enough in the same section of the ARRL book there's charts galore and a sub-section explaining that too

[QUOTE="M0GVZ, post: 727618, member: 22312"] Not the charts I was looking at in the ARRL book. They cover both ground and elevated. I know the OP was talking about elevated, not ground mounted. You misunderstand. The shortening of the vertical element has to be done as a result of the improved efficiency of the RF ground. And funnily enough in the same section of the ARRL book there's charts galore and a sub-section explaining that too [/QUOTE]

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