Cathode-ray tube with deflection system

DETAILED DESCRIPTION A cathode-ray tube according to the invention is therefore characterized in that the couplings include a coil having two sub-coils wound around a core with the same winding sense, one sub-coil forming part of the first coupling and the other sub-coil forming part of the second coupling.
The coil has the two sub-coils wound with the same winding sense, so that the inductance L coil of the coil is small and thus has little influence on the total L of the line deflection system and consequently no or only a slight influence on the deflection, and has a frequency-dependent energy loss factor.
For frequencies higher than the line frequency this energy loss factor increases.
As a result thereof, oscillations in the line deflection system having a frequency higher than the line frequency are damped to a greater extent than lower frequencies.
This results in a decrease in "ringing".
This is applicable to any existing cathode-ray tube without the necessity of modifying the design of the cathode-ray tube, except for the addition of the coil.
An embodiment of a cathode-ray tube according to the invention for which the capacitive coupling between one of the line deflection coils and the environment is greater than between the other line deflection coil and the environment, is characterized in that the energizing terminals are coupled to the other line deflection coil and the coil.
For such a cathode-ray tube in which the capacitive coupling between one of the line deflection coils and the environment is greater than between the other line deflection coil and the environment "ringing" will mainly occur in that line deflection coil which couples to the environment with the highest possible capacitive degree.
By coupling the energizing terminals to the other line deflection coil and the coil, the coil is coupled strongest to that deflection coil where "ringing" occurs.
The invention also relates to a deflection system for a cathode-ray tube, provided with the above-described anti-ringing means