Focus voltage circuit for television apparatus

Focus voltage control arrangement

Focus voltage correction circuit for cathode ray tubes

Focus voltage regulation circuit for cathode ray tubes

Focus yoke, electromagnetically focused CRT display with the foc

Focusing circuit for a cathode ray tube

Focusing device with permanent magnets for electron tube and ele

Focusing device with two dynamic windings for energy recovery

Focusing electrode system having burring parts of differing size

Focusing system for color TV camera

Focusing unit

Folded waveguide traveling wave tube having polepiece-cavity...

Format reconfigurable CRT display

Four-cavity velocity modulation tube

Fractionated-rectification high-voltage transformer with grouped

Frame assembly in flat cathode ray tube

Free space electron switch

Frequency independent CRT horizontal sweep generator having curr

Frequency modulated ballast with loosely coupled transformer...

Frequency multiplier including grid having plural segments