Lets try this all again.
There are TWO conditons possible in an antenna 'system' that includes the antenna AND the transmission line (known as the coax).
1. With a perfect match between the transmission line and the antenna there is no reflected power (known as SWR). Therefore the coax length has no length reguirement and no SWR so coiling has no effect.
2. With a missmatch "at the antenna", power not radiated will return back through the (inside) and some on the outside of the coax and is the swr you can measure with a meter in line.
The power that come back on the outside is called common mode.
Both the return power inside and outside will be sensitive to line length changes and even hand capacity indicating there is a match issue at the antenna.
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To conlude this, a 'near' perfect match at 1 to 1 or close in not line length sensitive.
There is no return power inside or out so coiling in any manner does nothing.
However if there is a missmatch as indicated be an SWR meter, the length will be sensitive 'AT THE POINT IN THE LINE IT IS MEASURED'. This means if you lengthen or shorten the line, the SWR reading will change ON THE METER ONLY. It does not change the missmatch at the anternna. You are only fooled into thinking a missmatch has been corrected unless you know better.
Under missmatched conditions and high SWR, power can return on the outside of the coax.
With this conditon, coilng the coax forms a choke that impedes the power coming back on the outside due to the missmatch at the antenna.
Listening to the CB experts only perpetuated a lack of knowledge they have and you keep passing it on to others.
Anyone doubts this, research it in antenna books on transmission lines and see for yourself instead of being led by people who just think they know.
Referring to incorrect sources is not proof otherwise.
Print this out and save it for reference next time there is a debate about it.
Good luck.
