RadioBanter - View Single Post - End-fed dipole

Telamon · November 15th 06, 04:42 AM posted to rec.radio.shortwave

In article .com,
wrote:

Telamon wrote:
In article . com,
" wrote:

What's the difference between an end-fed dipole and a random wire?

Is an end-fed dipole really 'balanced'? If so, how is this balance
achieved, and does the balanced nature of an end-fed dipole mean it
doesn't require an rf ground the way a random wire would?

Thank you for your time.

The "di" in Dipole means two as in elements. A dipole has two 1/4 wave
elements where a passing EM wave induces an opposing voltage or
potential at its output terminals where the two elements meet.

The way an random wire works with a output terminal on one end of a (1)
wire element is that it has to work against a counter poise or ground.
As such the best potential at its output terminal is when it is a 1/4
wave electrically to a passing EM wave where the dipole would be
electrically at 1/2 wave.

Now that you understand this you can understand that 1/2 wave random
wire is a waste of time and that a end-fed dipole random wire makes no
sense. Yes you can find it out there on the web. Plenty of confused
people in the world.

Exactly why is this a "waste of time": Now that you understand this
you can understand that 1/2 wave random wire is a waste of time.

The voltage is maximum at the center of a half wave dipole and zero at
the end. Is this enough of a further explanation for you?

--
Telamon
Ventura, California