A recording tape cartridge has a substantially rectangular case. A fluctuation is applied to the control of an output current or power related to the discharge lamp which is carried out for the ON period of the switching element, thereby changing a switching frequency. A force distribution material is disposed between the inner layer and the outer layer to spread any concentrated loads acting against the tubular. The color CRT, which has the sync signal separation and deflection circuit attached on at least a portion of the color CRT, allows a one-to-one matching of the deflection circuit and a deflection yoke by removing the causes of DY fluctuation due to the change of set condition.