Recent content by Cyranodb

  1. C

    modification with tubes of Studer A80's record amp

    I will look into A80 /rec/EQ/Osc/ schematics to better understand. Hovewer from what you are writing my understanding is that the additional circuitry you have developed injects tube/iron sound b/c NAB/IEC EQ stage and driver stage stay as they are. Some kind of follower to better match...
  2. C

    modification with tubes of Studer A80's record amp

    Tony, Is this design of any use in revox PR99 machines? Revox prosumer machines share the same recording PCB and oscylator board. Internal audio level is 80mV on rec input board but bias generator is only 150kHz. The heads may not be the same too. Andrew
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