[Amps] OFF TOPIC: Loop antenna question

[wb8jkr at juno.com]

 Naw, a Hertz is a cycle.

Mark  WB8JKR

On Sun, 26 Dec 2004 06:20:18 -0800 (PST) Joe Isabella <n3ji at yahoo.com>
writes:
> I thought a Hertz was a dipole...
> 
> 
> "R.Measures" <r at somis.org> wrote:
> 
> On Dec 26, 2004, at 12:40 AM, Alek Petkovic wrote:
> 
> > Have you thought of a section of open wire line in the feedline at 
> the 
> > feed point which puts the equivalent amount of wire into the loop 
> to 
> > resonate it on 75m?
> >
> > eg: a 75m loop for 3.9MHz is around 258' and for 7.2 MHz it would 
> be 
> > 140'. That is a difference of 118'. If you were to use a 59' 
> section 
> > of open wire, it would put 118' of extra wire into the loop.
> >
> The wire in a balanced feedline does Not add to the wire in the 
> antenna 
> -- i. e., antennas and feedlines are not like series resistors. .
> 
> The best antenna I have used for limited space on 80m - 160m is the 
> 
> (end-fed against gnd) Hertz. A 100' by 60' lot will accommodate a 
> fairly efficient Hertz antenna. The tradeoff is that a 
> remote-controlled L-network is required at ground level at the 
> driven 
> end of the wire.
> 
> > If it is not possible to do it that way, you could perhaps put one 
> or 
> > more loading stubs, say at the support points, still using open 
> wire, 
> > to make the antenna up to the total required length.
> >
> > I have not tried this but it could be a cheap solution and well 
> worth 
> > some experimentation.
> >
> > Good luck,
> > Alek. VK6APK