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Audio frequency beam tetrode
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Instance of beam tetrode
  • Marconi-Osram Valve
Start time 1937
Authority control
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KT66 (en); KT66 (pl); KT66 (de); KT66 (ru) Audio frequency beam tetrode (en); Низкочастотный лучевой тетрод (ru)

Media in category "KT66"

The following 8 files are in this category, out of 8 total.