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.....(4) It acts as one plate of a high voltage capacitor. The other plate is the conductive outside paint or “aquadag”. This capacitor filters the high voltage. Which is derived from the horizontal oscillator and has 15 kHz ripple.
I beg to differ. the capacitor that filters the HV is composed of the aquadag coating on the outside of the CRT, the aquadag coating inside of the CRT and the glass between the two aquadags acting as the dielectric. The aluminized coating on the back of the screen is not part of this capacitor.
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