|[AMRadio] Antenna current|
jpl15 at panix.com
Thu Apr 5 20:27:47 EDT 2007
On Thu, 5 Apr 2007, david knepper wrote:
> Why am I getting more antenna current in one lead than the other? I inserted
> an RF meter in each feedline before the antenna tuner. I believe that the
> current was about 1.5 and 1.7 R.F. ampere respectively at 3.870 Mhz.
First try exchanging the ammeters. If the problem is one of individual
calibration or tracking - then that will reveal it - the problem will
follow the meters.
Next - is everything exactly equal? Same leg heigth? Equal spacing at
the *feedpoint* of the antenna? No large Metal Things near one side of
I have the little MFJ crossed-needle balanced ammeter - the same thing
obtains with my loop, fed with 450-ohm commercial ladder-line: one side
draws slightly more current than the other. I attribute this to the fact
that one 'arm' of the loop tracks under the back eaves of the house - the
rest is disposed around the back fence.
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