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  Audio Research PH2 RIAA - MM amplifier    
         
  FFI Pre-amp RIAA, Buffer & Phones Not finished Several designs put together
  Hiraga Pre-amp Moving coil pre-amp Works 2-transistor design
  Kaneda Pre-amp RIAA & tome controls Not finished  
  LM 318 RIAA Low noise based on LM 394 Works Application notes AN-299, LB-52
  Mic amps Microphone pre-amp Works Symmetrical, based on Elector design
  Misc preamps Several designs    
  Mixer 01 Mixer w/Effects send & return Not built Stellan Lehrberg -99
         
  Roy Hansen amp Bass & CD input, phones out Works  
  Simple MC pre-amp MC head amp Works Sounds good. WW design idea.
  Siren Preamp Tube based    
  System A Pre-amp MC & MM RIAA pre-amp    
         
  Tone Controls Parametric & Wien Bridge Not finished Application note OA-26; active filters
         
  Unknown Microphone? General?    
  Walkmix 5-ch portable mixer Not finished JJ & mg design - LM833 Appl note