BEAM ANTENNA DESIGN

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W8UJX
Posts: 4
Joined: Tue Feb 28, 2006 4:33 am

BEAM ANTENNA DESIGN

Post by W8UJX » Tue Feb 28, 2006 4:36 am

For all you antenna home brewers out there.

I am going to build the 2-meter beam described on page 8-38 of the VHF/UHF DX Book.

Element lengths are given for Free Space, Full Contact with a metal Boom and thru the metal Boom but insulated from the Boom.

Question:
Does Free Space mean for use with a non-metalic Boom such as wood or fiberglass?

Second question:
The element diameter is specified as 4mm (0.157"). I assume I can use 3/16" (0.185") diameter aluminum with no change to the element length? But, you know what ASS U ME can do. Hi...

Tnx, Jerry - W8UJX

W0LPQ
Posts: 83
Joined: Wed Mar 05, 2003 4:51 pm
Location: Greenwood, IN

2 M Beam

Post by W0LPQ » Tue Feb 28, 2006 3:47 pm

Free space means just that .... hanging in free space.

Diameter difference you not should be of no impact.

Slight larger diameter will give better bandwidth....

Bill, W0LPQ

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