[TowerTalk] 160m 1/4 wave vertical help needed
Jim Brown
jim at audiosystemsgroup.com
Tue Sep 18 07:55:43 EDT 2007
On Mon, 17 Sep 2007 00:04:55 -0400 (EDT), donovanf at starpower.net wrote:
>Suggest you try an instrument that operates at transmitter power levels,
>such an a VSWR meter or an LP-100 Digital Wattmeter (my favorite),
>before you pull any more hair out.
Strongly agree. Also, remember that the radiation resistance of an ideal
quarter wave vertical is on the order of 37 ohms, lower for a shorter
radiator. The loss resistance of the ground system you describe will bring
it closer 50 ohms, and improving it will lower it. In other words, you
should see about 1:1 with the first ground system, and maybe 1.2:1 when you
add the radials.
Jim K9YC
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