Tube amplifiers

OTL – Output Transformer Less

• OTL Amplifier - Background and OTL Circuits http://www.audiodesignguide.com/otl/aria.html (saved link)
• 6C33C – OTL http://www.tubetvr.com/otl.html (saved link)
• Tubecad article 001 JRB http://www.tubecad.com/2004/blog0022.htm (saved link)
• Tubecad article 002 JRB http://www.tubecad.com/articles_2001/totem-pole_output_stage_psrr/Totem-Pole_Output_Stage.pdf (saved pdf)
  

Cathode followers

Futterman

Circlotron

• Circlotron according to Wiki http://en.wikipedia.org/wiki/Circlotron

• Distorsion Analysator  http://sound.westhost.com/project52.htm (saved link)
  
• Measure transformers http://www.crystal-radio.eu/entrafometing.htm (saved link)
• Measure input and output impedance http://www.zen22142.zen.co.uk/Theory/inzoz.htm (saved link)
• Simulate imput impedance http://www.zen22142.zen.co.uk/Tina/tinainz.htm (saved link)
• Simulate output impedance (saved link)

• Tracing Accurate Plate Curves (dmitryhizh) http://www.dmitrynizh.com/plate-curve-tracer-acpc.htm (saved link) curvertracer.jar test files dsp
  
• Tube simulation tips, tricks (dmitryhizh) http://www.dmitrynizh.com/pspice-how-to.htm (saved link)
• Model Paint: Trace Tube Parameters (dmitryhizh) http://www.dmitrynizh.com/tubeparams_image.htm (saved link) jar-file test file 2a3
• Tubes Curves Tracer (dissident audio) Yves Monmagnon http://www.dissident-audio.com/Traceur/Page.html (saved link) article source program
• Eico 666 modified http://www.dmitrynizh.com/eico666.htm (saved link)