Sorry I'm too tired to look up a better example, but
http://members.aol.com/BmgEngInc/Adcock.html
is still pretty good. It's essentially about like the
"phased verticals" the other fellow mentioned, in that
they both result in a "cardioid" pattern, i.e. a sharp
*notch* in the pattern, broadside to the array in this
case.

Thanks, Sluggo, but this is partly an oops!

The BMG pages are a very good resource (as are many RDF sites).

OOPS! The Adcock is just like a loop -- two nulls off both broadside faces.
The version that looks similar (previously mentioned) where you have two
vertical dipoles spaced 1/4 wave and a 3/4 wave connecting cross-feed line
gives the cardioid -- one null.

"Sluggo" wrote in message
news:h3dmk1p0od57ig3q5qpm1qgq5gkdtdq3lm


73, Steve, K,9.D;C'I

On Wed, 12 Oct 2005 15:37:17 -0500, "Steve Nosko"
wrote:


OOPS! The Adcock is just like a loop -- two nulls off both broadside faces.
The version that looks similar (previously mentioned) where you have two
vertical dipoles spaced 1/4 wave and a 3/4 wave connecting cross-feed line
gives the cardioid -- one null.

"Sluggo" wrote in message
news:h3dmk1p0od57ig3q5qpm1qgq5gkdtdq3lm


73, Steve, K,9.D;C'I

Thanks for the correction; I'm only in my 40's but I've been
hamming a long time, and the years are starting to blur...
Now that I think back on my "real world" experience, the boom
on what I thought was an Adcock could well have been a
wavelength at 2M, tho, as I said, it's kinda fuzzy now... so
it may be that the elements were NOT fed at the center.
Oh well, either way, a good notch is going to beat the
best yagi.

Man, those must be some tasty turtles, to go to all this
trouble to track 'em down...

73, tnx agn..

Sluggo

"Sluggo" wrote in message
...
...

Thanks for the correction; I'm only in my 40's but I've been
hamming a long time, and the years are starting to blur......
Sluggo


Damn young whipper snappers... (;-)

73, Steve, K,9.D;C'I