Al,
Using 3 1/8" Heliax is approaching the proper length to diameter
ratio for optimum Q which should provide a deeper notch and increase
the total isolation. It may even be enough to eliminate one cavity
per leg. All of the designs I've seen use the foam type, I doubt the
air line insulator supports will provide enough mechanical stability.
Bruce, WB6ARE
On Mar 16, 2006, at 7:31 AM, Al Wolfe wrote:
> Most of the discussion I've seen for the 6 meter Heliax
> duplexer has
> been centered around using 1 5/8" Heliax. Has anyone used 3 1/8"
> stuff?
> Would there be any advantage to using the larger size? I have some
> available.
>
> Has anyone used the foam 1 5/8 instead of air line for a duplexer?
>
> Thanks,
> Al, K9SI
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> Yahoo! Groups Links
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