Series String Order
According to various editions of the RCA Receiving Tube Manual, the heater string of an AC/DC radio should be arranged in a particular order to minimize hum. Assuming that all functions are performed by separate tubes, the heaters in the string should be arranged as follows:
- Input stage
- Ballast tube or resistor
- Rectifier
- Audio power output amplifier
- RF and IF amplifiers
- Converter
- First AF amplifier
- Detector
- Ground/B-minus line
Not all manufacturers followed this recommendation.
Read more about this topic: All American Five
Famous quotes containing the words series, string and/or order:
“Galileo, with an operaglass, discovered a more splendid series of celestial phenomena than anyone since.”
—Ralph Waldo Emerson (1803–1882)
“Supposing everyone lived at one time what would they say. They would observe that stringing string beans is universal.”
—Gertrude Stein (1874–1946)
“Out of the slimy mud of words, out of the sleet and hail of verbal imprecisions,
Approximate thoughts and feelings, words that have taken the place of thoughts and feelings,
There springs the perfect order of speech, and the beauty of incantation.”
—T.S. (Thomas Stearns)