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Old October 17th 03, 01:50 PM
Edward A. Feustel
 
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Default Adjustment of simple balanced tuner

I am new to this type of tuner and am hoping to benefit from other's
experience.

My new balanced tuner has a parallel lc circuit. The output to the antenna
is taken by clips placed on the
coil. A series tuned link is used from the 50 ohm input.

What is a short process for tuning? I have tried moving the taps around at 3
turn intervals and
trying to minimize the SWR. It seems that if I tune the series tuned link
off resonance the reflected
power decreases, but so does the incident power. Ditto the parallel link.

Must I put the tap on each turn of (the large coil) and see what comes out
lowest? Or are there
some "shortcuts". Is it likely that I will be able to produce a match over a
wide range of impedances
with this tuner? My first experiences have been rather frustrating to say
the least.

Thanks.
Ed


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Old October 17th 03, 04:02 PM
pa1are
 
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Default

Allways start tapping at the outer ends of the coil (total L) and try to
find a point where SWR=1.
If you don't succeed try tappping more toward the centre of the coil until
you can get SWR=1 by turning the capacitors.
I prefer the classic Z-match... easier to use.

73, Arend PA1ARE

"Edward A. Feustel" wrote in message
...
I am new to this type of tuner and am hoping to benefit from other's
experience.

My new balanced tuner has a parallel lc circuit. The output to the antenna
is taken by clips placed on the
coil. A series tuned link is used from the 50 ohm input.

What is a short process for tuning? I have tried moving the taps around at

3
turn intervals and
trying to minimize the SWR. It seems that if I tune the series tuned link
off resonance the reflected
power decreases, but so does the incident power. Ditto the parallel link.

Must I put the tap on each turn of (the large coil) and see what comes out
lowest? Or are there
some "shortcuts". Is it likely that I will be able to produce a match over

a
wide range of impedances
with this tuner? My first experiences have been rather frustrating to say
the least.

Thanks.
Ed




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