Some Audio and other Articles/Projects on Vacuum Tubes or Valves. Also he has made Online Calculators .. Bias Tool, Gain Tool and Low crossover cap.
Some articles written by Alan Kimmel, as it did in the years 1993 to 2004 on the original Tube Labs.
The Choke Assisted Mu Stage, Why use the Kimmel mu stage, 7 A few variations of the mu-stage