3/4 wavelength is : 3750000 meters
so the ring gap (using harmonic math ) should be 1.25 cm or .49 inches
height should 37.5 cm (can't really use 3.75 cm
) or 14.76 inch you can reverse it too: 3.75 cm gap for a 12.5 cm height
) or 14.76 inch





, optimal for resistance heating is 1,16 Wh/deg celsius. I use only 1,16 when calculating cop, example: 1,16/0,28 = cop 4,14. This means OU device in this case only used 0,28Wh instead of 1,16Wh for heating one litre water one celsius degree
, optimal for resistance heating is 1,16 Wh/deg celsius. I use only 1,16 when calculating cop, example: 1,16/0,28 = cop 4,14. This means OU device in this case only used 0,28Wh instead of 1,16Wh for heating one litre water one celsius degree

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