Loop goes on
resonance 80, 60, 40 and 30m. To the top of the pipe from the ground is
7.8m.
Loop is formed of 42mm
copper pipe, outer diameter of loop is 1600mm. Loops top has adjustable
vacum
capacitor 750pF. Loop lower part has the feed and there I have used the
Ferrite Toroid Core FT-240-43
To my great surprise 20m band works well with ML too.
Capacitator and Stepper motor.
Magnetic Loop Controller by LA3JJ/OH8GKP
More
information here: https://sites.google.com/site/lofturj/to-automatically-tune-a-magnetic-loop-antenna