Beam idea

[555]

say i took a m-105
set it up vertical and then slide the element straight up
so that there would be no elements below the boom.
any ideas or thoughts
still fed by gamma match

 

[74IN]

Flimsy.

 

[555]

the elements would have to be upgraded

 

[74IN]

Mobile beams are set up in a similar fashion, so I guess it would work fine, just dunno why you'd want to.

 

[W5LZ]

The first thing that comes to mind is that the elements are going to have to be much stronger to support themselves. Probably need some means of keeping the separation between elements the same, bracing. And keep the feed point of the driven element centered in the element. You'd also need to work out a means of insulating the elements from the boom (end-effect from voltages could be lots of fun). Or,maybe hang all the elements like wind chimes? Same problem keeping separation though. Seems 'do-able', but a lot of trouble for no practical benefit. Do it! Take lots of pictures!
- 'Doc

 

[Marconi]

555, if you could overcome all the problems to construct and make work this idea, what advantages would you expect?

In particular how would you attach the gamma to the driven element?

 

[radiodawg259]

WHY

 

[Captain Kilowatt]

The elements would have to be supported by a very good and very strong insulator.Strong for the obvious reason and very good as in high voltage rating because the ends of a dipole element are high voltage points.I will ask the question as others have as well, WHY? What do you expect to gain?

 

[Marconi]

555, what did you ever do about this idea to modify your yagi antenna as you suggested?

 

[555]

my thought was to take a beam like a m-105
even go with a square tubing boom
the elements would still be spaced as to the m-105 specs
but the elements would not be going below the boom

just to make the "top elements " longer

and as for feeding the beast

still have the gamma match attached to the driven element

im still pondering the idea