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H03B—GENERATION OF OSCILLATIONS, DIRECTLY OR BY FREQUENCY-CHANGING, BY CIRCUITS EMPLOYING ACTIVE ELEMENTS WHICH OPERATE IN A NON-SWITCHING MANNER; GENERATION OF NOISE BY SUCH CIRCUITS
H03B7/00—Generation of oscillations using active element having a negative resistance between two of its electrodes
H03B7/02—Generation of oscillations using active element having a negative resistance between two of its electrodes with frequency-determining element comprising lumped inductance and capacitance
H03B7/10—Generation of oscillations using active element having a negative resistance between two of its electrodes with frequency-determining element comprising lumped inductance and capacitance active element being gas-discharge or arc-discharge tube
Verfahren zur Zentrierung des Elektronenstrahls, insbesondere fuer Fernsehbildroehren, mit einem die Strahlachse ringfoermig umgebenden Permanentmagneten und Anordnung zur Durchfuehrung des Verfahrens