Tube Amp Archive

This discussion is mentioned earlier in this old topic. You add a 15% or so of cathode resistance (in series to the cathode/cap pair) tail resistor to the cathode resistor/bypass capacitor pair of the power tube on the ground side to ground. It adds enough negative feedback to remove nasty intermodu...

I realize this is a 10 year old thread, but I thought I'd say thanks and mention why I say thanks. I recently built a number of somewhat novel 5 watt EL84 amps using a Matchless inspired topology, i.e., a paralleled twin triode in V1 and an EF86 pentode for V2 before the tone stack and then the EL84...