Quote:
Originally Posted by old_tv_nut
The HOT under normal operation is either on hard, so the voltage across it is low when current is flowing; or it is completely off, so the current is zero while the voltage is high. Therefore , the power dissipated is low, because the product of (voltage x current) is low or zero. Without the drive waveform, it can be somewhere in between - this condition of having both current and voltage means that the power dissipated in the HOT goes up drastically.
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I don't see a problem with installing a bypassed cathode resisitor to limit plate current, in the event of drive signal loss. My mid 50's RCA B&W has this. But a lot of TV's don't have it. Were they too cheap to spring for a resistor and cap? What am I missing?
Kevin