greetings,

can someone direct me on the ways driven element of a yagi is attached
to a boom. can a driven element (folded dipole or ordinary
dipole)electrically connected to a boom or not? what will be the
effect? or can i use wood as a boom? can someone also give me some
formula on yagi design (length, spacing etc)

help would be greatly appreciated.

thanks,

ian

wrote in message
oups.com...
greetings,

can someone direct me on the ways driven element of a yagi is attached
to a boom. can a driven element (folded dipole or ordinary
dipole)electrically connected to a boom or not? what will be the
effect? or can i use wood as a boom? can someone also give me some
formula on yagi design (length, spacing etc)

You can make the boom out of anything that will be mechanically strong
enough. If it is conductive or not will have an effect on the lengths of
the elements. It will also change if the elements are insulated or not.
Depending on the design of the driven element element, it may or may not be
connected to the boom.

You really need to just find the type of beam you want and copy it. If you
find one you want and the frequency is diffeant , you can scale it, but you
must be sure to scale all the parts, boom diameter, element diameter and all
the other elements.

can someone direct me on the ways driven element of a yagi is attached
to a boom. can a driven element (folded dipole or ordinary
dipole)electrically connected to a boom or not? what will be the
effect? or can i use wood as a boom? can someone also give me some
formula on yagi design (length, spacing etc)

Just do a Google search on DL6WU - you can download the design program
and go from there.
Alan
VK2TWB

All YAGI elements can, and most are, center mounted on a conductive boom.

Reason: Voltage minimum.

You could use wood, but, man oh man, the problems that will surface
under weather condx.

wrote:

greetings,

can someone direct me on the ways driven element of a yagi is attached
to a boom. can a driven element (folded dipole or ordinary
dipole)electrically connected to a boom or not? what will be the
effect? or can i use wood as a boom? can someone also give me some
formula on yagi design (length, spacing etc)

help would be greatly appreciated.

thanks,

ian

Yagi had a friend named Boo-Boo and a girl-friend named Suzy.

wrote in message
oups.com...
greetings,

can someone direct me on the ways driven element of a yagi is attached
to a boom. can a driven element (folded dipole or ordinary
dipole)electrically connected to a boom or not? what will be the
effect? or can i use wood as a boom? can someone also give me some
formula on yagi design (length, spacing etc)

help would be greatly appreciated.

thanks,

ian

The question you ask is very broad.

I suggest you get a copy of any ARRL Radio Amateur's Handbook and
start there. If your interest is not high enough to pay the price of
the book, most Public Libraries have copies to loan. At this point,
the year of publication is not likely an important consideration.

After that, rephrase your question and come back to the group.

On 2 Sep 2005 18:21:07 -0700, wrote:

greetings,

can someone direct me on the ways driven element of a yagi is attached
to a boom. can a driven element (folded dipole or ordinary
dipole)electrically connected to a boom or not? what will be the
effect? or can i use wood as a boom? can someone also give me some
formula on yagi design (length, spacing etc)

help would be greatly appreciated.

thanks,

ian

There are two other books to look for:

_Yagi Antenna Design_ by James L. Lawson, W2PV
_Physical Design of Yagi Antennas_ by David B. Leeson, W6QHS

These will answer just about any question you might have about Yagis.
Both are published by the ARRL.

Roy Lewallen, W7EL

John Ferrell wrote:
The question you ask is very broad.

I suggest you get a copy of any ARRL Radio Amateur's Handbook and
start there. If your interest is not high enough to pay the price of
the book, most Public Libraries have copies to loan. At this point,
the year of publication is not likely an important consideration.

After that, rephrase your question and come back to the group.

On 2 Sep 2005 18:21:07 -0700, wrote:


greetings,

can someone direct me on the ways driven element of a yagi is attached
to a boom. can a driven element (folded dipole or ordinary
dipole)electrically connected to a boom or not? what will be the
effect? or can i use wood as a boom? can someone also give me some
formula on yagi design (length, spacing etc)

help would be greatly appreciated.

thanks,

ian

wrote:

greetings,

can someone direct me on the ways driven element of a yagi is attached
to a boom. can a driven element (folded dipole or ordinary
dipole)electrically connected to a boom or not? what will be the
effect? or can i use wood as a boom? can someone also give me some
formula on yagi design (length, spacing etc)

help would be greatly appreciated.

thanks,

ian


At VHF and higher there are eventually problems from corrosion with
uninsulated elements on conductive booms unless the elements are welded
to the boom. At HF, actually by 6m, the problems are ignorable, because
the boom diameter is not a significant fraction of a wavelength.

So 6m and down, whatever you want is fine, 2m and up, uninsulated is
better for a long lived beam.

And that goes for all elements.

Tom
K0TAR

Tom Ring wrote:

So 6m and down, whatever you want is fine, 2m and up, uninsulated is
better for a long lived beam.

That would be insulated.

Tom
K0TAR