The 130 foot dipole puts great demands on the 4:1 balun. Even if the balun
does a good job of the 4:1 transformation the coax will still see a VSWR
above 10:1 on every band. The loop, if one wavelength or more at 3.5 MHz
will provide a lower VSWR and not tax the balun as much.
The IR vertical will restrict you to 7 MHz and above. If this is acceptable
it is a good choice with a modest or better GND system. By modest I mean a
dozen 25' radials.
Dave WX7G
On Sun, Sep 20, 2009 at 3:32 PM, Robert Kirkland <alpha76@triton.net> wrote:
> Which one would you prefer?. A 130 foot dipole center fed with 450 Ohm Twin
> Lead into a 4 to 1 Balun and 52 Ohm Co-Ax to a Tuner. Or, a Super Loop into
> a 4 to 1 Balun with 52 Ohm Co-Ax to (hopefully no) antenna tuner. Or a Big
> IR vertical.
> Bob, w5pvr
>
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