TY - JOUR T1 - On the Variations of Wave-Length of the Oscillations Generated by Three-Electrode Thermionic Tubes due to Changes in Filament Current, Plate Voltage, Grid Voltage, or Coupling JF - Proceedings of the Royal Society of London. Series A, Containing Papers of a Mathematical and Physical Character (1905-1934) VL - 96 IS - 680 SP - 455 EP - 465 PY - 1920/02/03/ UR - http://dx.doi.org/10.1098/rspa.1920.0009 M3 - doi:10.1098/rspa.1920.0009 AU - Eccles, W. AU - Vincent, J. ER -