A power supply with capacitive mains isolation, comprises a source of an input supply voltage developed between a first terminal and a second terminal. Each micro-component contains a gas or gas-mixture capable of ionization when a sufficiently large voltage is supplied across the micro-component via at least two electrodes. In operation, in one embodiment, the roller barrel of the roller bearing is rotated by engaging a surface of the tape roller barrel with a longitudinally moving magnetic tape. \u201cSuper Galena\u201d is comparable to Galena in its aroma and bitterness profile but offers a substantially higher yield and complete resistance to hop powdery mildew strains found in Washington, United States.