**GRUMPY**
Administrator/The Boss
Classic Radio Operator Olde Timer 8220 [/color][/center]
"The King of Ping"
Posts: 4,342
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Post by **GRUMPY** on Jan 19, 2013 22:53:10 GMT -5
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Sandbagger
Administrator/The Boss
Posts: 6,245
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Post by Sandbagger on Jan 19, 2013 23:10:29 GMT -5
The material that the antenna is made out of is not the issues, it's the ground plane radials that most of the fiberglass "stick" antennas lack. Without those radials, which provide signal decoupling, RF currents can reflect down the shield of the feedline causing TVI and a "hot" shack. They also lower the radiation angle of the antenna, which usually makes it perform better. But in order for the radials to truly work as intended, they have to be solidly connected to the ground side of the antenna. If they are simply clamped to the fiberglass mast, they will not do much.
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**GRUMPY**
Administrator/The Boss
Classic Radio Operator Olde Timer 8220 [/color][/center]
"The King of Ping"
Posts: 4,342
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Post by **GRUMPY** on Jan 19, 2013 23:33:02 GMT -5
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Post by FIXR on Jan 20, 2013 0:16:39 GMT -5
I have used the MACO ground plane radials on my A99 for about 20 years now.
Alan
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**GRUMPY**
Administrator/The Boss
Classic Radio Operator Olde Timer 8220 [/color][/center]
"The King of Ping"
Posts: 4,342
|
Post by **GRUMPY** on Jan 20, 2013 0:30:59 GMT -5
I have used the MACO ground plane radials on my A99 for about 20 years now. Alan So Alan.... did you always have the ground plane kit on the A99, or did you add it on? What difference did you see with it on and off? Did it help with a RF issues?
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Post by FIXR on Jan 20, 2013 0:53:46 GMT -5
Scott,
I can't say for sure. At the same time I installed the radials I also raised it up about 15 more feet.
Alan
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Post by cbrown on Jan 21, 2013 10:40:01 GMT -5
I'm with Sandbagger, they should help with keeping the RF getting beck into the shack through your feedline plus change your take off angle.
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