On 7/16/2020 1:14 AM, Victor Rosenthal 4X6GP wrote:
If the antenna is well-balanced and fed via a true balanced antenna
tuner (preferably link-coupled) then there shouldn't be a problem with
common mode currents.
Few ham antennas are perfectly balanced -- they are often unbalanced by
their surroundings. For example, ground slope, unequal heights of the
two halves, other conductors around the antenna, even vegetation. And
yes, all elements of the antenna system, including the feedline, the
antenna, and matching at both ends, contribute to the balance of the SYSTEM.
THAT'S why it's wrong to talk about "balanced line," using "parallel
wire" or 2-wire" line instead.
73, Jim K9YC
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