Gary -

Look at these web sites.

L.B. Cebik, W4RNL basics on the HB9CV antenna.
The HB9CV version of the 2-element phased array appeared in 1961. In Europe,
some writers refer to almost any 2-element horizontal phased array as an
HB9CV, while the English-speaking world tends to refer to the ZL- Special to
mark the genre of antenna. The HB9CV version of the antenna and many
variants are widely used in Europe, with Christmas tree stacks for 20- 15-10
meters. Users swear by them, claiming near to, and sometimes better than,
3-element Yagi performance.
http://www.cebik.com/hb.html

There are a number of "copies" and homemade versions
of this antenna on the market
http://www.page.sannet.ne.jp/ja1hwo/...4elhb9cv_e.htm

http://www.alfa-tango.com/ant/hb9.php4

Make sure that the former owner did not "modify" this antenna
http://davidkearns.co.uk/G8TTI/HB9CVdetails.htm

http://www.wimo.de/verteiler-e.htm?s37a_e.htm

This is the 28 MHz version
http://14at259.chez.tiscali.fr/hb9cva1.htm

73 de Greg
w9gb
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"Gary Morton" wrote in message
...
At the recent FRARS radio rally I bough a cheap HB9CV antenna for 6m
(there
were no 3 element yagis on sale). When I got it home I noticed that a hole
had
worn in the plastic and that some bolts and spacers (for the gamma match
elements - if that is the right description) had fallen out. My only
concern
was for the spacers to hold the "thin rods" away from the main elements.
The
supplier wasn't particularly helpful. I have a suspicion that the spacing
may
be critical, but the supplier didn't seem knowledgeable.

[ SNIP ]

regards...

--Gary (M1GRY)