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By the way, when I was at Motorola in the late 60's, we developed an instant-on circuit that eliminated one extra power switch pole by bucking two transformer windings against each other in the standby mode. With this simplification, there was no separate switch section for the pilot light, which was put on the same circuit as the filaments. The design was not approved for production until several executives had taken sets home to see if they could see the pilot light in standby mode in the dark of their bedrooms.
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