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I understand that the antenna uses the vehicle as part of the groundplane as well as the "spill over" of the ground plane that tries to use the real ground for a mirror. All this being said, what happens as you lower the feed point toward the ground? In a base the feed point height changes the take off. Same in a car I suppose?

This all started when I took the radio and 102 whip out of my truck and mounted them in the car. The whip was mounted to the toolbox in the truck but in the car it is mounted on the side by the tail light. So it's almost 3 feet lower to the ground and has zero metal below the feed point unlike the truck. The radio works way better. Amazingly way better. So is it the height off the ground, the ground being used more as the groundplane, the take off angle, the truck bed not trapping or reflecting back into the antenna or what?

<blockquote data-quote="nfsus" data-source="post: 802668" data-attributes="member: 19649">I understand that the antenna uses the vehicle as part of the groundplane as well as the &quot;spill over&quot; of the ground plane that tries to use the real ground for a mirror. All this being said, what happens as you lower the feed point toward the ground? In a base the feed point height changes the take off. Same in a car I suppose? This all started when I took the radio and 102 whip out of my truck and mounted them in the car. The whip was mounted to the toolbox in the truck but in the car it is mounted on the side by the tail light. So it&#039;s almost 3 feet lower to the ground and has zero metal below the feed point unlike the truck. The radio works way better. Amazingly way better. So is it the height off the ground, the ground being used more as the groundplane, the take off angle, the truck bed not trapping or reflecting back into the antenna or what?</blockquote>

[QUOTE="nfsus, post: 802668, member: 19649"] I understand that the antenna uses the vehicle as part of the groundplane as well as the "spill over" of the ground plane that tries to use the real ground for a mirror. All this being said, what happens as you lower the feed point toward the ground? In a base the feed point height changes the take off. Same in a car I suppose? This all started when I took the radio and 102 whip out of my truck and mounted them in the car. The whip was mounted to the toolbox in the truck but in the car it is mounted on the side by the tail light. So it's almost 3 feet lower to the ground and has zero metal below the feed point unlike the truck. The radio works way better. Amazingly way better. So is it the height off the ground, the ground being used more as the groundplane, the take off angle, the truck bed not trapping or reflecting back into the antenna or what? [/QUOTE]

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