The still left antenna (a horizontal hoop) lessens the amplitude since the remaining hand is moved closer to it, when the appropriate antenna (a vertical pole) raises the pitch as the right hand is moved in the direction of it. For the last 57 yrs, the business Bob Moog Started https://manualliftingequipment18482.blogrelation.com/44845766/everything-about-mezzanine-safety-gates-uk