The Analysis of Air Condenser Loss Resistance

This paper gives the results of an analysis of the variation over the wavelength range from 35 to 63.5 meters of the loss resistance of a specially constructed variable air condenser. The condenser and the method of measurement are described. It is shown that the losses at any capacitance value and frequency may be represented by a fixed resistance plus an effective resistance arising from a constant power factor in the insulating material supporting the movable plate. The expression for the condenser loss resistance is compared with similar expressions for variable air condensers obtained by previous authors.