This expirement was done to try to lower the noise floor on HF. On my Endfed the Noise floor is S9+.
Both tuning capacitors come from old AM radios and because their sections are switched in series , they can be used up to 30 Watts without arcing.
The loop is made of RG-213 coax and rests on a cross made of 6 mm. fibreglass rods ( kite shop ).
Inside the tuner is a shortcut between the centre and the braid of the coax loop to form a solid ring .
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