and experiences a resistance increase resulting in a tapering of the alternating current and corresponding diminishing of the degaussing field it will be appreciated that the circuit description thus far in general pertains to any conventional vrt type color television receiver with degaussing the difference is in the addition of a secondary winding 21 which is connected through another thermistor 22 across the terminals of primary winding 13 with this arrangement transformer 10 operates as a conventional transformer as long as the resistance of thermistor 22 is sufficiently low to permit energization of secondary winding 21 as is true of thermistor 52 when the receiver is turned on from a cold start the resistance of thermistor 22 is low and secondary winding 21 is supplied with full line potential enabling much higher current flow in the degaussing circuit by preventing core saturation the resistance of thermistor 22 increases rapidly within a few cycles disabling secondary winding 21 and restoring operation of the transformer to its normal voltage regulating mode however the current most importantly the initial current supplied to degaussing winding 53 is sufficiently high to degauss the picture tube and associated permeable material without requiring an unduly low resistance degaussing current path the degaussing circuit is also seen to be isolated from the transformer primary in fig2 a modified embodiment is disclosed in which secondary winding 21 is replaced with an.