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#1
July 17th 09, 09:42 AM
posted to rec.radio.amateur.antenna
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50 ohm Ground Plane Antenna
What is the correct angle of the ground legs down of the horizontal
plane in order to get 50 ohm at the feed point ? Thanks a lot ! Best 73 de Claude |
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#2
July 17th 09, 01:52 PM
posted to rec.radio.amateur.antenna
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50 ohm Ground Plane Antenna
Claude Frantz wrote:
What is the correct angle of the ground legs down of the horizontal plane in order to get 50 ohm at the feed point ? Thanks a lot ! Best 73 de Claude About 45 degrees. Roy Lewallen, W7EL |
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#3
July 17th 09, 05:16 PM
posted to rec.radio.amateur.antenna
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50 ohm Ground Plane Antenna
the answer is: 'it depends'. on the number of radials, their diameter, the
vertical radiator diameter, height above ground, etc, etc, etc... my recommendation is to build it and bend until you are happy. "Claude Frantz" wrote in message ... What is the correct angle of the ground legs down of the horizontal plane in order to get 50 ohm at the feed point ? Thanks a lot ! Best 73 de Claude |
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#4
July 18th 09, 05:09 PM
posted to rec.radio.amateur.antenna
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50 ohm Ground Plane Antenna
Dave wrote:
the answer is: 'it depends'. on the number of radials, their diameter, the vertical radiator diameter, height above ground, etc, etc, etc... my recommendation is to build it and bend until you are happy. Agreed, my home made loft mounted 4m groundplane has two radials and it was simple job to get a perfect match using the MFJ259 and some gentle bending. Charlie. -- M0WYM www.radiowymsey.org Sign today! http://petitions.pm.gov.uk/SaveShortwave/ |
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#5
July 18th 09, 05:45 PM
posted to rec.radio.amateur.antenna
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50 ohm Ground Plane Antenna
Dave wrote:
the answer is: 'it depends'. on the number of radials, their diameter, the vertical radiator diameter, height above ground, etc, etc, etc... my recommendation is to build it and bend until you are happy. Yeah, but if you start at about 45 degrees, you will likely have a lot less bending to do, if any at all. -- Jim Pennino Remove .spam.sux to reply. |
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#6
July 18th 09, 07:25 PM
posted to rec.radio.amateur.antenna
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50 ohm Ground Plane Antenna
On Jul 18, 12:45*pm, wrote:
Dave wrote: the answer is: 'it depends'. *on the number of radials, their diameter, the vertical radiator diameter, height above ground, etc, etc, etc... *my recommendation is to build it and bend until you are happy. Yeah, but if you start at about 45 degrees, you will likely have a lot less bending to do, if any at all. -- Jim Pennino Remove .spam.sux to reply. 45 below horizontal has always been the magic # for me.. Jimmie |
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#7
July 20th 09, 06:48 AM
posted to rec.radio.amateur.antenna
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50 ohm Ground Plane Antenna
Many thanks to you all !
Best 73 de Claude |
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