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One For The Radio Boffins. Vhf Antenna Question

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I pulled apart my 8' vhf antenna today to see if I can repair it after using it to find a tree (I found one and it won!).

I was surprised to see the coax inner stops 6" above the coax end and does no more, the outer of the coax becomes the main element with a small coil then carrying on halfway up to another coil before going all the way to the tip, I would have expected it to be the other way round.

I this a normal thing?

It has always performed fine both at transmitting and receiving (and finding trees.) so no complaints just confused, I have heard southwold harbour from reedham and regularly hear boats calling somerleyton bridge from southwold so I say it works pretty well.

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