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The path for the beam current is the coupling capacitor. Electrons are drawn into the coupling capacitor throught the diode during sync pulses, then flow from the capacitor into the cathode and the CRT beam during active video.
On average over time, the charge drawn through the diode equals the discharge through the beam current.
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Last edited by old_tv_nut; 04-01-2020 at 10:42 AM.
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