[Lowfer] Aerial Type Designation, help please.

[mikea]

On Tue, Mar 24, 2009 at 09:15:40AM -0500, PAUL DAULTON wrote:
> Perry is that what is reffered to as a "turnstyle" antenna?
> -----Original Message-----
> From: w8au at sssnet.com
> Sent: Mon, 23 Mar 2009 21:57:33 -0400
> To: evp at pacbell.net,<lowfer at mailman.qth.net> 
> Subject: Re: [Lowfer] Aerial Type Designation, help please.
>  
>  
> At 08:47 PM 3/23/2009, you wrote:  
> > Don't know if there's an "official" name but certainly  
> > Marconi and others used such a configuration "way back when".  
> >  
> >"I am trying to find the correct name for an aerial described thus:-  
> >  
> >Four vertical support masts, A, B, C & D in rotation. With two wires - one  
> >between A & C, the other between B & D. The two wires are joined where
> > they bisect each other. At this bisection joint, a vertical wire drops down to
> >the transmitter or tuning unit beneath. Thus, a vertical monopole with a  
> >crossed top-hat, but is there a more professional designation?  
>  
> Just a version of the "Marconi T." A vertical with capacity hat.  

My understanding is that the turnstile antenna is a different critter
entirely: a set of two dipoles at 90° to one another, fed 90° out of phase.
The modified Marconi-T antenna you describe is just a capacitative probe
with a larger capacitative top-hat on it.

-- 
Mike Andrews, W5EGO
mikea at mikea.ath.cx
Tired old sysadmin