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multi-band delta loop

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TOPIC: multi-band delta loop

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#225

va3qy

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Posts: 3

multi-band delta loop 2 Years, 6 Months ago

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hello everyone.
Wish to share my design of delta loops which has served me well.

The key is to make use of 4:1 balun vs 75ohn matching line. This allows you to operate as follows:
if the loop's fundamental frequency is 40, 20 m will be fully functional and with 1:1 swr.
On 20 m loop, i had found that antenna works extremely well across 17,15,12 not to mention 10m.

For the balun, i chose to use air core since it was impossible for me to get ferrite core; so i used 40mm white pvc pipe. Please ensure that you use stainless steel nuts and bolts; galavnised just rust and you run into tvi issues.

www.eham.net/articles/10738

Please do not hesistate in contacting me with any questions. This antenna has been replicated all over and works as said.

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