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Old 10-05-2005, 10:05 PM
Jeff Liebermann
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Default Re: cantenna experiments

On Wed, 05 Oct 2005 16:26:32 -0400, bjs555 <aaa@bbb.com> wrote:

>Ok, I put up pictures at:
>http://www.patmedia.net/bseiler/CantennaPics/


The exposed center conductor of the coax cable is *FAR* too long.
Doing a coax to board transition is not easy, especially with the fat
coax you're using. Continue the bare copper wire shield wrap right up
to the end of the coax. Trim the center conductor to where it just
barely sticks out beyond the shield. Shave some of the insulation to
get the center conductor closer to the SMA center pin. Solder the
copper wrap to the SMA ground pins.

Otherwise, do it right and get a pigtail or adapter.

The probe length should be 1/4 wave (31mm) from the shield on the F
connector. You might wanna try a conical probe for improved
bandwidth.



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