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I am beginning to understand but still have a lot of open questions. I get idea of the resonance of the antenna. The point where the most amount of energy transferred to the antenna is radiated out. I understand what SWR is and how it has less relation to SWR than most people think but still have relation. And how shortening antennas and adding loading coil lowers the bandwidth of an antenna. As an example, my K30 on the wife's car has an SWR of 1.2 on ch 19 but on ch 1 and 40 it is 1.6. The SWR curve is steeper than, say, my Wilson 1000 that had an SWR of 1.2 on ch 1 and 40 and didn't move the needle on 19. Though the Wilson still has the need of a loading coil, it has a 62" whip vs the 36" whip of the K30. The longer radiator on the Wilson makes it more resonant over more bandwidth. Then my 102" is very broad banded, being a full 1/4 wave, and not needing a loading coil. The SWR is flat across all 40 channels. I need to learn more of capacitance, reactance, capasitive reactance, inductance. My biggest problem is that knowing the antenna theory won't help too much as I have no way of measuring for any of it, which also means I can't fix it.

<blockquote data-quote="roadrage" data-source="post: 388690" data-attributes="member: 21185"><p>I am beginning to understand but still have a lot of open questions.&nbsp; I get idea of the resonance of the antenna.&nbsp; The point where the most amount of energy transferred to the antenna is radiated out.&nbsp; I understand what SWR is and how it has less relation to SWR than most people think&nbsp; but still have relation.&nbsp; And how shortening antennas and adding loading coil lowers the bandwidth of an antenna.&nbsp; As an example, my K30 on the wife&#039;s car has an SWR of 1.2 on ch 19 but on ch 1 and 40 it is 1.6.&nbsp; The SWR curve is steeper than, say, my Wilson 1000 that had an SWR of 1.2 on ch 1 and 40 and didn&#039;t move the needle on 19.&nbsp; Though the Wilson still has the need of a loading coil, it has a 62&quot; whip vs the 36&quot; whip of the K30.&nbsp; The longer radiator on the Wilson makes it more resonant over more bandwidth.&nbsp; Then my 102&quot; is very broad banded, being a full 1/4 wave, and not needing a loading coil.&nbsp; The SWR is flat across all 40 channels.&nbsp; I need to learn more of capacitance, reactance, capasitive reactance, inductance.&nbsp; My biggest problem is that knowing the antenna theory won&#039;t help too much as I have no way of measuring for any of it, which also means I can&#039;t fix it.</p></blockquote><p></p>

[QUOTE="roadrage, post: 388690, member: 21185"] I am beginning to understand but still have a lot of open questions. I get idea of the resonance of the antenna. The point where the most amount of energy transferred to the antenna is radiated out. I understand what SWR is and how it has less relation to SWR than most people think but still have relation. And how shortening antennas and adding loading coil lowers the bandwidth of an antenna. As an example, my K30 on the wife's car has an SWR of 1.2 on ch 19 but on ch 1 and 40 it is 1.6. The SWR curve is steeper than, say, my Wilson 1000 that had an SWR of 1.2 on ch 1 and 40 and didn't move the needle on 19. Though the Wilson still has the need of a loading coil, it has a 62" whip vs the 36" whip of the K30. The longer radiator on the Wilson makes it more resonant over more bandwidth. Then my 102" is very broad banded, being a full 1/4 wave, and not needing a loading coil. The SWR is flat across all 40 channels. I need to learn more of capacitance, reactance, capasitive reactance, inductance. My biggest problem is that knowing the antenna theory won't help too much as I have no way of measuring for any of it, which also means I can't fix it. [/QUOTE]

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