[Antennas] Loading inductances

David J Windisch davidw at copper.net
Wed Jul 7 17:43:48 EDT 2004


Hi, Harvey:

;o)

Doing the experiment was the point ... everybody wants to do it in software
these days.   Judging by  on-the-air activity, almost everybody is.

;o)

73, Dave, N3HE

PS:   Google N2PK and look at the VNA stuff.

----- Original Message ----- 
From: "Harvey&Bessie" <w4tg at bellsouth.net>
To: "David J Windisch" <davidw at copper.net>
Cc: <Antennas at mailman.qth.net>
Sent: Wednesday, July 07, 2004 2:11 PM
Subject: Re: [Antennas] Loading inductances


> I wouldn't do that at all, unless you like to spend time with a
hit-or-miss experiment.
> Beg, or borrow an antenna bridge and measure the reactance of the vertical
at the
> frequency you wish to use it on (it will be capacitive if shorter than 1/4
wavelength).
> Then using the formula in the handbook, calculate the size of the coil
which will give you
> the required inductive reactance to balance out the capacitive reactance
of the vertical.
> Harvey/W4TG
>



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