Some Recent Developments In The Audion Receiver

@article{Armstrong1997SomeRD,
  title={Some Recent Developments In The Audion Receiver},
  author={Edwin H. Armstrong},
  journal={Proceedings of the IEEE},
  year={1997},
  volume={85},
  pages={685-697}
}
The action of the audion as a detector and simple amplifier is explained, with the method of verification of the theory by means of oscillograms. [...] Key Method To reinforce the oscillations in the grid circuit two methods are employed: first, to couple the grid circuit to the wing circuit and arrange the latter to permit radio frequency currents to pass freely in it; and second, to use a large inductance in the wing circuit, thereby tuning it to the incoming frequency (in conjunction with the capacity…Expand
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