[FoxHunt] antennas for harmonic sniffing

[Kuon & Dale Hunt]

>Great Dale:
>
>The URL is not working try:
>
>http://www.cebik.com/wb46.html
>for his wide spaced 6 el. 420, I didn't find the short one.


    From the antennas page there are several OWA articles
    in the VHF menu.  One is something like, "wide band
    yagis for 10, 6 and 2m", and there are OWA collections
    for 2m and 220 that go up to 13 elements or more.  All
    show the freespace horizontal pattern for the 6-element,
    though I don't know if the vertical pattern appears
    anywhere.  (I think his article on scaling antennas for
    other bands uses the same basic design.)

    In freespace, about 10dBi, 50 degree beamwidth (if I
    remember correctly), and across the 2m bandwidth the
    SWR is below 1.3 : 1 with direct 50 ohm feed and all
    sidelobes are below -20dB (below -25dB on the design
    frequency.)

    W4RNL is careful to give credit for this design to two
    others whose calls I don't remember, but certainly LB
    has done a lot to publicize it and generalize the
    principle to other numbers of elements.

    For those of you who haven't seen it, this is an excellent
    resource site for antenna designs.  His article on choosing
    and building a 3-element yagi (in the HF Yagi menu) is an
    excellent introduction to the different tradeoffs in
    antenna design, and I scale his recommended designs for my
    tape measure beams.  His 3- and 4-element quad formulas
    give very clean patterns and direct coax feed.  There is
    information on the 2-element Moxon that I want to try for
    2m hunting, phased arrays, corner reflectors, log periodics,
    LaPorte rhombics, antennas for hunting ELTs, bobtail curtains,
    plus much more.


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