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Is blockage of Jpole bottom stub ok?

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November 18th 08, 12:29 AM posted to rec.radio.amateur.antenna

Fred McKenzie Fred McKenzie is offline

Fred McKenzie is offline

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First recorded activity by RadioBanter: Jul 2006

Posts: 317

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Is blockage of Jpole bottom stub ok?

In article
,
wrote:

I'm trying to
decrease the overall mounted size of a jpole design.

Xray-

Why not use the top of the mast as part of the antenna?

You could either measure 3/4 wavelengths down from the top and bolt-on
the 1/4 wave stub, or measure 1/4 wave down and bolt-on a 3/4 wave main
element!

You could run the coax inside the bolt-on element, and out through a
hole at the matching point.

Fred
K4DII

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