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Old November 12th 04, 09:34 PM
Lee Hopper
 
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Dr. Slick wrote:
I'm certain that one of two things (or a
combo of both) did the trick, but i wanted to
see if any of you seasoned antenna boys could
guess what the problem was.


Dear Dr -

This is just a WAG, but were you supporting the dipole on an aluminum
ladder at first? Then substituted a non-metalic support?

Thanks for the interesting topic - I see it has long legs!

Lee H, NB7F
antenna boy...
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Old November 13th 04, 03:20 PM
'Doc
 
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Dr. Slick wrote:
"(1)A properly tuned and positioned dipole will
be resonant at only one frequency.
(2)Double-dips are a bad sign, and the return loss suffers."

(1) - Nope, just not true.
(2) - Not true either. (see #1)

With the two 'dips' not being harmonically related, it
appears that there is some 'other' reason, the feed line
for one, or something near the antenna (a person for instance?).
'Doc


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Old November 13th 04, 04:56 PM
Cecil Moore
 
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'Doc wrote:
Dr. Slick wrote:
"(1)A properly tuned and positioned dipole will
be resonant at only one frequency.
(2)Double-dips are a bad sign, and the return loss suffers."

(1) - Nope, just not true.
(2) - Not true either. (see #1)

With the two 'dips' not being harmonically related, it
appears that there is some 'other' reason, the feed line
for one, or something near the antenna (a person for instance?).
'Doc


He said something about radials. Radials not attached to the
antenna are like parasitic elements. Two shorter radials will
resonate at a higher frequency than two longer radials.
--
73, Cecil, W5DXP
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Old November 14th 04, 04:11 AM
Lee Hopper
 
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Along those same lines: did you swap a metal mast for a fiberglass one?

NB7F
antenna boy
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