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Old August 7th 03, 01:00 AM
Dave Shrader
 
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But, it has the same gain as the dipole when both are configured the
same for Az and El.

BTW, the gain off the end of a rotatable dipole is the same as the gain
off the end of a fixed dipole.

When modeled in EZNEC, I don't see an input for rotatable dipole!!! If
the X,Y,Z coordinates are the same then the gain is the same. Rotate
both 90 degrees and the gain is still the same.

Trolling tonight is very poor. The Red Sox are playing. I don't know
whether to be happy or sad.

Deacon Dave, W1MCE

W5DXP wrote:

Dave Shrader wrote:

The gain of a dipole is the gain of a dipole.



Yes, and a fixed dipole doesn't have much gain off the ends compared
to a broadsided rotatable dipole. EZNEC says the maximum gain of my
dipole off the ends is "MAX GAIN = 0.88 dBi". I am extremely pleased
with my rotatable dipole. So much so that another element is just
not worth that extra half an S-unit.



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Old August 7th 03, 01:12 AM
W5DXP
 
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Roy Lewallen wrote:
Having two lobes is way different than radiating only in two directions.


Depends on the defined courseness of the directions. With my rotatable
dipole running North-South, it only radiates well in two directions,
East and West, which is approximately half of the two out of four possible
course directions.
--
73, Cecil http://www.qsl.net/w5dxp



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Old August 7th 03, 01:15 AM
W5DXP
 
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Dave Shrader wrote:
BTW, the gain off the end of a rotatable dipole is the same as the gain
off the end of a fixed dipole.


Thus the advantage in being able to rotate it.
--
73, Cecil http://www.qsl.net/w5dxp



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Old August 7th 03, 02:44 AM
'Doc
 
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Cecil,
Since mine isn't at the 'optimum' height, I hear
stuff from all around me.
'Doc
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Old August 7th 03, 02:50 AM
'Doc
 
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Jim,
If you follow the 'normal' rules for using twin-
lead feed line you shouldn't have any more (or any
less) problems than if you used coax. There is always
the possibility that RF will 'eat up' all the electrical
appliances in your house, but maybe not.
Nothing except your pocket says you can't change feed
lines or antenna if you want. So, try it and see what
happens...
'Doc


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