Vacuum Tube PLL

Discussion in 'The Projects Forum' started by DrNick, May 10, 2007.

  1. DrNick

    Thread Starter Active Member

    Dec 13, 2006
    110
    2
    I am looking in to building a phase locked loop out of vacuum tubes. Can anyone recommend any tube models that would be good for making VCO's and phase detectors?
     
  2. John Luciani

    Active Member

    Apr 3, 2007
    477
    0
    You didn't mention the frequency of the VCO. You could check out some of the
    early Theremin schematics. The RCA Theremins were made with tubes.
    The Theremin VCOs are in the 100-300KHz range.

    Try thereminworld.com for some schematics.

    (* jcl *)
     
  3. DrNick

    Thread Starter Active Member

    Dec 13, 2006
    110
    2
    I am just looking to do this for audio frequencies...but I'll check out the site that you suggested.
     
  4. John Luciani

    Active Member

    Apr 3, 2007
    477
    0
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