[WVDXA] 6 M Beam

[Dave Heil]

Charlie Young wrote:

> I found all the parts except the boom to mast clamp, and one piece of 
> the gamma match assembly, which happens to be the one where the SO 239 
> mounts to the antenna.  I will jury rig something for now.

Charlie,

If you get too tangled in the gamma match, one of the easiest systems to 
build is the hairpin match.  Make the driven element a little too short 
and cut a hairpin six or so inches long.  Short the hairpin at various 
places along its length until you find the sweet spot of SWR minimum. 
Then cut a new hairpin  to that length.  You may use that as is or you 
may choose to bond the "U" of the hairpin to the boom, in which case 
you'd have a beta match rather than a hairpin.  Either way, it'll work fine.

I used the hairpin method in building my 12/17 meter yagi (two elements 
per band).  The hairpin feeds the 17m section and the 12m driven element 
is shock excited.

73,

Dave K8MN