[Antennas] How do you use an antenna tuner?

Mon, 11 Mar 2002 14:04:57 -0500

	Would we be able to find the maximum radiation by using a field
strength meter?


> > 
> > My 2 cents worth.
> >  Tuners can tune things they really have no business
> > tuning in the first place, and since a t-net tuner has
> > infinite settings for a match(only 1 being the correct
> > setting), it is difficult to know when the tuner is
> > doing any good.
> >  THe simplest method for tuning(from Walt Maxwell's
> > 'Reflections') is to add a current sensing indicator on
> > the ouput side of the tuner.  This is a very simple
> > device consisting of small powdered iron toroid(eg,
> > T50-2), a germanium diode, capacitor, 50k ohm carbon
> > potentiometer, and a good meter. The antenna center
> > output is wound 1 turn thru the toroid, and about 20
> > turns of small diameter wire is wound for the
> > secondary.  Tuning for maximum output on the meter is
> > all that is required. WHen the tuner settings are at
> > their optimum, the meter is showing the most antenna
> > current.
> > 
> >  Without an output indicator, tuning in receive mode
> > for maximum received signal will indicate optimum
> > setting also.
> > 
> >   Pat W0OPW
> > 
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