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The Water Cooler
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I’m old enough to remember when...
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<blockquote data-quote="OKNewshawk" data-source="post: 3518905" data-attributes="member: 6592"><p>I believe it used piezoelectric crystals to create ultrasonic sound waves. Did you know that certain vacuum cleaners would make a harmonic of the frequency that would cause the TV to change channels on its own? I think my grandmother's TV did that a few times when she was running her Hoover.</p><p></p><p>Speaking of the Moon landing... Our TV stations came from Philadelphia and the ABC station was on channel 6. The audio frequency for channel 6 was at the extreme low end of the FM radio dial. My brother had brought home a Sansui stereo system after one cruise and we had it set up in the living room. Since the Moon walk was so late, I set the TV to channel 6, tuned the stereo receiver to pick up the audio and put on a pair of headphones, then turned the TV sound all the way down. That way, I could hear everything but not disturb my parents, who were asleep.</p></blockquote><p></p>
[QUOTE="OKNewshawk, post: 3518905, member: 6592"] I believe it used piezoelectric crystals to create ultrasonic sound waves. Did you know that certain vacuum cleaners would make a harmonic of the frequency that would cause the TV to change channels on its own? I think my grandmother's TV did that a few times when she was running her Hoover. Speaking of the Moon landing... Our TV stations came from Philadelphia and the ABC station was on channel 6. The audio frequency for channel 6 was at the extreme low end of the FM radio dial. My brother had brought home a Sansui stereo system after one cruise and we had it set up in the living room. Since the Moon walk was so late, I set the TV to channel 6, tuned the stereo receiver to pick up the audio and put on a pair of headphones, then turned the TV sound all the way down. That way, I could hear everything but not disturb my parents, who were asleep. [/QUOTE]
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