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"Wilson publishes that their coil Q on the Wilson 5000 is 864, as tested by Dr. Dwight Heim."

Heim is an advertising tool. this is so clear to anyone who has bothered to notice that he doesn't specify whether the "Q" is loaded or unloaded. the omission of information always lends itself well to advertising purposes.
while the unloaded "Q" (out of circuit) may well be as he claims, the truth of the matter is that when the inductor is part of an LC (filter) circuit exerting a profound effect upon bandwidth the loaded "Q" is typically one fifth of that figure.

furthermore, "Q" is only one of several factors that determine antenna efficiency. case in point, a 160 meter antenna (approximately 136' @ quarter wave) that has been helically wound and reduced to a fraction of its physical size to adapt it to mobile operation is much less efficient than a quarter wave for 27 mhz. that has been physically reduced to only half its full physical quarter wave dimensions.

so much for the helical 160 double extended zepp on a plastic garbage can.

<blockquote data-quote="freecell" data-source="post: 150115" data-attributes="member: 30">&quot;Wilson publishes that their coil Q on the Wilson 5000 is 864, as tested by Dr. Dwight Heim.&quot;Heim is an advertising tool. this is so clear to anyone who has bothered to notice that he doesn&#039;t specify whether the &quot;Q&quot; is loaded or unloaded. the omission of information always lends itself well to advertising purposes.while the unloaded &quot;Q&quot; (out of circuit) may well be as he claims, the truth of the matter is that when the inductor is part of an LC (filter) circuit exerting a profound effect upon bandwidth the loaded &quot;Q&quot; is typically one fifth of that figure. furthermore, &quot;Q&quot; is only one of several factors that determine antenna efficiency. case in point, a 160 meter antenna (approximately 136&#039; @ quarter wave) that has been helically wound and reduced to a fraction of its physical size to adapt it to mobile operation is much less efficient than a quarter wave for 27 mhz. that has been physically reduced to only half its full physical quarter wave dimensions.so much for the helical 160 double extended zepp on a plastic garbage can.</blockquote>

[QUOTE="freecell, post: 150115, member: 30"] "Wilson publishes that their coil Q on the Wilson 5000 is 864, as tested by Dr. Dwight Heim." Heim is an advertising tool. this is so clear to anyone who has bothered to notice that he doesn't specify whether the "Q" is loaded or unloaded. the omission of information always lends itself well to advertising purposes. while the unloaded "Q" (out of circuit) may well be as he claims, the truth of the matter is that when the inductor is part of an LC (filter) circuit exerting a profound effect upon bandwidth the loaded "Q" is typically one fifth of that figure. furthermore, "Q" is only one of several factors that determine antenna efficiency. case in point, a 160 meter antenna (approximately 136' @ quarter wave) that has been helically wound and reduced to a fraction of its physical size to adapt it to mobile operation is much less efficient than a quarter wave for 27 mhz. that has been physically reduced to only half its full physical quarter wave dimensions. so much for the helical 160 double extended zepp on a plastic garbage can. [/QUOTE]

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