Effects of manufacturing tolerances on a typical non-stabilized line deflection circuit

A typical circuit in which correct amplitude and linearity is obtained with nominal components is considered. The conditions studied are those which will cause a reduction in deflection amplitude and/or cause a deterioration in linearity. The items considered effecting width and/or linearity are: line transformer, deflection coils, drive shaping network, h.t. feed choke, tuning capacitor, feedback capacitor, c.r.t., vertical stabilizing choke, ¿S¿ correction, h.t. and heater variations, and the earth´s magnetic field.