|
There are sets that use a manual degauss switch, like some of the Porta-colors. These use a SPDT switch...in the un-activated position, there is a cap which charges up with boost voltage. When you hit the switch, the cap discharges into the degauss coils.
Most of the older auto degauss circuits I'm familiar with have the degauss coil connected in series between the power transformer secondary and the rectifier diodes...the thermistor shunts across the coil. Thus when the set is cold, the thermistor is high-resistance and most of the current being drawn by the set goes through the degaussing coil on its way to the diodes, then when the thermistor heats up, it becomes low resistance and shunts the current away from the degauss coils.
|