[TowerTalk] 1/4 wave vertical question

[Ron W8RJL]

Rick,  you are correct, I was in a rush and had my thinking backwards.
>From the feed point to the trap should be 1/4 wave for 30 meter ~23 feet 
depending on conductor diameter.
The trap should be resonant at about 10 MHZ. It is better to error on the 
low side.
On 40 meters the 23 foot section plus the inductance of the trap plus what 
is above the trap resonates on 40 meter.
Feed impedance depends on many factors including the numbers of radials.
73, Ron W8RJL


----- Original Message ----- 
From: "Richard (Rick) Karlquist" <richard at karlquist.com>
To: "Tower and HF antenna construction topics." <towertalk at contesting.com>
Sent: Monday, April 19, 2010 1:52 AM
Subject: Re: [TowerTalk] 1/4 wave vertical question


>
>
> Ron W8RJL wrote:
>>>From the bottom of the vertical to the bottom of the 40 meter trap will 
>>>be
>> about 32 feet depending on the diameter of the vertical. The larger the
>
> The trap should be a 30 meter trap located about 24 feet up.
>
> Rick N6RK
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