JIMMIE wrote:
While pondering the design of a broadband antenna that would cover
from 50 to 450 Mhz I considered a log periodic array. This would serve
my purpose but the size would be inconvienent. Then I had a thought,
Could I remove the elements that are not required for amateur band
coverage? In my case I am only interested in 50, 144,and 432 MHz
bands, Would this allow me to shorten the boom by an amout equal to
the space occupied by the removed elements and have a gain of 7Dbd.
Could I cover all 3 bands with just the elements for 6 and 2m?
Any thoughts on this would be greatly appreciaated.

A properly functioning LP usually has only one set of
elements resonant at a time. For 70cm operation, three
sets of elements would be resonant, one set at 1/2WL,
one set at 3/2WL, and one set at 9/2WL.
--
73, Cecil http://www.w5dxp.com

Cecil Moore wrote:
A properly functioning LP usually has only one set of
elements resonant at a time. For 70cm operation, three
sets of elements would be resonant, one set at 1/2WL,
one set at 3/2WL, and one set at 9/2WL.

The above should have said HF LP. Here is one "compact
hybrid" that is advertised to cover 30 MHz to 3 GHZ.
It only weighs 8 pounds.

http://www.tdkrfsolutions.com/WebDat...3CWebSheet.htm
--
73, Cecil, w5dxp.com

On Thu, 28 Jun 2007 09:35:37 -0500, Cecil Moore
wrote:

Cecil Moore wrote:
A properly functioning LP usually has only one set of
elements resonant at a time. For 70cm operation, three
sets of elements would be resonant, one set at 1/2WL,
one set at 3/2WL, and one set at 9/2WL.

The above should have said HF LP. Here is one "compact
hybrid" that is advertised to cover 30 MHz to 3 GHZ.
It only weighs 8 pounds.

http://www.tdkrfsolutions.com/WebDat...3CWebSheet.htm

How would they possibly get a direction effect on the lower
frequencies with that design
I doubt it.

w.

H. Wabnig wrote:
Cecil Moore wrote:
http://www.tdkrfsolutions.com/WebDat...3CWebSheet.htm

How would they possibly get a direction effect on the lower
frequencies with that design I doubt it.

Maybe in an anechoic chamber, one doesn't need
a directional antenna?
--
73, Cecil, w5dxp.com