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:
“Every man sees in his relatives, and especially in his cousins, a series of grotesque caricatures of himself.”
—H.L. (Henry Lewis)
“As I came home through the woods with my string of fish, trailing my pole, it being now quite dark, I caught a glimpse of a woodchuck stealing across my path, and felt a strange thrill of savage delight, and was strongly tempted to seize and devour him raw; not that I was hungry then, except for that wildness which he represented.”
—Henry David Thoreau (18171862)
“Beauty is desired in order that it may be befouled; not for its own sake, but for the joy brought by the certainty of profaning it.”
—Georges Bataille (18971962)