[Antennas] Vertical Rrad, capacity hat formulae request

Thu, 11 Mar 2004 09:43:38 -0800

George, maybe also point him at Reg's site in  the UK?
G4something-with-a-Q?  I am out the door to a picture taking session with
the doctors and don't have time to fire up the other machine.

tia,
Gary WA6DTX
----- Original Message -----
From: "George, W5YR" <[email protected]>
To: <[email protected]>; "tttt ccccc" <[email protected]>
Sent: Thursday, March 11, 2004 8:35 AM
Subject: Re: [Antennas] Vertical Rrad, capacity hat formulae request

> Download EZNEC demo from W7EL and model the antenna?
>
> 73, George W5YR
> Fairview, TX
> [email protected]
> http://www.w5yr.com
>
>
> ----- Original Message -----
> From: "tttt ccccc" <[email protected]>
> To: <[email protected]>
> Sent: Thursday, March 11, 2004 9:48 AM
> Subject: [Antennas] Vertical Rrad, capacity hat formulae request
>
>
> > I'd be grateful for the formula to calculate Rrad for vertical monopoles
> > greater
> >
> > than 90 degrees long.
> >
> >
> > Also, do the standard "surge impedance" and "short circuit at the top of
> > the
> >
> > antenna" formulae hold up if the antenna is more than 90 degrees long?
> >
> >
> > I'd also be grateful for the formula (ae) to calculate the effect of
> > adding top loading
> >
> > wires at 90 degrees to an exsisting top loading wire.  And the formula
> > that would
> >
> > account for adding a "rim" wire about these wires.
> >
> >
> > Yet another query:
> >
> > I'm looking into a 5/8 wave ground-mounted vertical and would be
> > appreciate any
> >
> > starting point values for the resonating and matching reactances.
> >
> > Be Well,
> >
> > Tim  K3HX
> >
> >
> >
> > Can't find it in the ARRL Publishing Company's Antenna  Book and the
> > nomograph
> >
> > printed therein appears  inaccurate.
> >
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