[Top] [All Lists]

[Towertalk] Re: [Towertalk] F12 C4S

To: <>
Subject: [Towertalk] Re: [Towertalk] F12 C4S
From: (
Date: Mon, 8 Jul 2002 15:20:05 +0200
Transmitting is not everything and a dipole has a low rejection of 
unwanted signals from high angles, it's F/S is quite objectionable to 
be considered directivity at medium high elevations.
If this were not enough I didn't find any gain by a dipole (half WL 
from ground or more) over a quarter wave vertical, on 40m, beyond 1000 
miles hops.
Here in south europe, more than sometimes a vertical is quieter and 
reduces broadcasting signals so allowing more reception of NA signals 
above 7.1 MHz.
Surely, instead of an horizontal dipole I'd go for something with 
directivity, like a two element yagi or a set of switchable sloping 
The extra gain over a simple dipole or a vertical will be the marginal 
issue, while reception is hundred times better.

Mauri I4JMY

> If you care about 40 meters, the C4S will walk all over the vertical.
> 52 is a wee bit low, but it is still high enough to outperform any
> single vertical. BTW, the F12 linear loaded stuff is very sensitive to
> metallic guy wires in the vicinity. If this is a self-standing or low
> support crankup, you will do fine.
> 73, Guy.
> ----- Original Message -----
> From: "Bruce Osterberg" <>
> To: <>
> Sent: Sunday, July 07, 2002 5:51 PM
> Subject: [Towertalk] F12 C4S
> >
> > Good Afternoon:
> >
> > Well if you only had one tower and wanted a 4 band system would you
> go with
> > this antenna if your tower could handle it?  I would like to put a
> > tri-bander at 52 feet on a Crank up tower, and was thinking about
> one that
> > had a 40 meter dipole as one of the elements.
> >
> > After Reading Steve Morris and H. Ward Silver, K7LXC, N0AX,
> tribander report
> > I know They likesd the C3,  C4, combo. ( even though c4 was not
> tested), but
> > would I get any benefit on the 40 meter dipole, or should I stick to
> the
> > elevated 1/4 wave vertical at 20 feet with eight sloping 1/4 wave
> radials?
> >
> > If I did not get this antenna I would get the C31XR.
> >
> > 73 Bruce N9BX

<Prev in Thread] Current Thread [Next in Thread>