On Wed, 8 Jun 2011 11:22:11 -0400
Al Kozakiewicz <akozak@hourglass.com> wrote:
>With a brand new MFJ
>300W dummy load I measure 50.1 ohms with my old Fluke
>DMM. ...65 ohms in the 20m band
Al,
You should measure the dummy load with an impedance
analyzer. It may be that the load resistors have some
inductance, resulting in the impendance being frequency
dependent. High quality dummy loads normally use zero
inductance resistors and usually have flat impedance
characteristics, but they can be more expensive.
George, AA7JV
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