On May 31, 1:07*pm, walt wrote:
On May 31, 11:07*am, Wond wrote:



* * *I sort of think also, the Lazy H (think colinear?) should be fed and
phased with 75 ohm line.

On Mon, 30 May 2011 14:48:45 -0700, walt wrote:

If you feed at the center of the line connecting the two radiating
elements the phasing will be correct regardless of the velocity
factor, because the length from the center feed point on the
connecting line will be the same from that point to each radiating
element. With this configuration of feeding don't put a twist in the
connecting line--the two radiating elements MUST be fed IN PHASE! If
they're fed out of phase the array will look like an Adcock direction-
finding antenna, with a deep null in the radiation pattern in the
broadside direction.

Just my thoughts,

Walt, W2DU

Another point to consider, Mark, is that the azimuth beam width is
narrower with the lazy-H than that of the dipole. So perhaps the
apparent lower signal level is in directions off the side of the
radiation pattern, where one would expect the signal level to be lower
than that of the dipole at the same angle.

Walt

I "MAY" have figured out what was wrong with the Lazy H. This is a
tentative post.

The Lazy H is located in Charleston, South Carolina and it is
broadside to Southern California. It should be aiming just barley
north of West and just barely south of East. The first clue came when
a station in the Caribbean gave me a 20 over S9 report. That
direction should be in a null spot. The propagation has been coming
in from Texas, Southern California, Central and South America, and the
Northeast (New York, Mass, New Jersey, etc). Well today the
propagation rolled in from the North west, and I saw a signal increase
from a station in Iowa when I compared the Lazy H to the dipole. That
is not the direction the Lazy H is facing, so it occurred to me there
might be something skewing the propagation angle of the antenna to the
north west and south east. Since there has not been any propagation
from the North/west direction until today I had nothing to test it
against. I went outside and noticed the 450 ohm feed line was not
coming away from the Lazy H at a 90 degree angle. It was more of a
45 degree angle. I added some length to the 450 ohm ladder line, and
then repositioned the feed line to come away from the Lazy H at a 90
degree angle. When I went back to test the antenna it was beginning
to show gain in the intended direction. Also the tuner had an easier
time matching the antenna. I may have to play with it some more, but
I may have found the missing 5.9 dbd gain with 1/2 wave spacing. I'm
going to keep my fingers crossed and hope I don't have to retract this
post.

Michael Rawls
KS4HY