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Signal Tubes

  1. HomeKnowledge BaseSignal Tubes

Signal Tubes

This section contains detailed technical information and pretty much everything you need to know about the miniature B9A tubes (12AX7, 12AU7 and 12AT7 types) utilised in the larger Effectrode effects pedals and in the Binson Echorec tube echo-delay machines and the subminiature types used in our smaller pedals. It also contains fascinating historical articles about these marvellous devices and vacuum tubes in general.

The detailed drawing below, taken from the 1950 edition of the RCA Receiving Tube Manual, clearly shows the internal construction of a miniature signal tube.

tube_diagram1
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A complete digitised copy of the RCA Receiving Tube Manual can be downloaded here as a pdf [the size is 14MB].

In This Section

  • Black Plate Tubes
  • Chemical Highlights of Tube Manufacturing
  • Cryogenic Treatment of Tubes: An Engineer’s Perspective
  • Developments in Trustworthy-Valve Techniques
  • Evolution of the Tube
  • Foil Those Tube Forgers
  • Microphonics
  • Mullard ECC83 (12AX7) Reissue vs Original – A Physical Comparison
  • Mullard ECC83 (12AX7) Reissue vs Original – An Electrical Comparison
  • Noise
  • Oxide Cathode Life: Investigations into the Causes of Loss of Emission
  • Signal Tubes
  • Speed, Efficiency & Perfection – Aims That Have Built a Mammoth Factory in 16 Years
  • Steampunk Technology: The Inner Workings of Vacuum Tube Buffers
  • Subminiature Tubes: The Future of Audio!
  • That’s a Sylvania tube, the print is green, no, it’s blue
  • The ‘Magic Eye’
  • The ’12AT7′ Tube
  • The ’12AU7′ Tube
  • The ’12AX7′ Tube
  • The 12AX7 Tube – The Cornerstone Of Guitar Tone
  • The 6SN7GT – the best general-purpose dual triode?
  • The Accurate BSPICE Tube Models
  • The Cool Sound of Tubes
  • The Tube Family Tree – Part 1
  • The Tube Family Tree – Part 2
  • The Tube Family Tree – Part 3
  • Tube Vendors
  • Tubes: The Old Verses the New
  • Vacuum Tubes and Transistors Compared
  • Valve Microphony Part 1: Production of Microphony and Methods of Investigation
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