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OTL = Output Trasformer Less Tube Amplifiers

My consideration on problems of each design:

  • Ciclotron balanced design problems (type 1):
  • Technics design problems (type 2)
  • SRPP (type3)
  • Futterman design (type 4)
       At this time I don't have found problems.


    Follows a circuits gallery of new design

    Old design circuits


    Understanding OTL design in the article Background and OTL Circuits by aria

    Understanding Basic Circuits by Atma-Sphere 

    Commercial OTL Graaf GM-200

    Fourier Panthere


    Trascendent Sound inc