RadioBanter - View Single Post

September 7th 05, 03:58 AM

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