The schemeshown in the figure, is used for tubes with u n=6,3 V filament current IR=0.3 A, i.e. for most black-and-white kinescopes.
IC DA1 is attached to the radiator area of ~20 cm2 (you can use the free area of the Board of foiled fiberglass).
Adjusted by the resistor R1 to set an appropriate filament voltage (7 V), preferably off C3.
The rise time of the voltage is determined by the capacitance of the capacitor CP. Actually the voltage increases more than 30 seconds (the more - the more slowly due to leakage through R1).
Author: S. Dmitriev, Chuvashia, Margalski rn, Calaycay.
The second device provides a gradual heating of the filament of the tube in black and white monitors electronics MS and the like. The heating time is blocked the work of the horizontal sweep of the display. After gradual warming to the glow of the tube is fed a full 12V through the normally open contacts K1.1.
The device is assembled on a small printed circuit Board and is set perpendicular to the display Board in any space. Relay K1 - type RES-64 RS4.569.724 or other reed on the voltage 7 V and a current of not more than 5 mA. When replacing the potentiometer to change the resistance of the resistor R5. The device needs no adjustment.
Author: A. Daineko, Gomel region, Svetlogorsk district, D. Polesie; Publication: N. Bolshakov, rf.atnn.ru