Vol. 12, No. 4

Volume 12, Number 4

Part of a fine collection of developmental metal tubes. See inside for more details Photos: Bob Millard.

In this issue
  • A trip to remember
  • ETL Dekatron Survey 2009
  • Weird Tube of the Month: RCA 20-kw VHF Tetrode
  • Classical Philips Transmitting Tubes
  • More on GE Metal Tubes
  • UHF-TV Microminiature Ceramic Tubes
  • The Varian Honeycomb Grids
  • A Type 87?

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