Dear Mike and All,
I am using a 'tuned conterpoise' on HF for a long time now. The systems
electrical setup equals a tuned series circuit (in fact the same as the
vertical earial it self). The point is this circuit has a series resonating
resistance wich unfortunately on LF can not be made as low as the resistance
of the existing earth system that is parallel to it. Only at extremely high
tuning coil Q's this system will start to work. But the effords on making a
high Q coil is better put to work for the loading coil it self HI. I am
afraid Finbar's results are actually caused by the galvanic impovement on
his earth system by adding the extra wire.
Greetings and best 73's
Michael Sanders, PA3BSH
mailto:[email protected]
-----Oorspronkelijk bericht-----
Van: [email protected] [mailto:[email protected]]namens
Mike Dennison
Verzonden: maandag 15 november 1999 11:05
Aan: [email protected]
Onderwerp: LF: Tuned radial
At the weekend, I tried using a tuned radial instead of my earth
stakes. This followed Finbar's recent success.
I ran a single wire up the garden - about 20m - one metre high. I
tuned it by using it as an antenna tuned against ground and
adjusting a series loading coil for resonance. The normal antenna
was then reconnected and the tuned radial used instead of earth.
Unfortunately, I could not get any current into it at all, even though
the antenna resonated at about the right frequency.
Any thoughts?
Mike, G3XDV (IO91VT)
http://www.dennison.demon.co.uk/activity.htm
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