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Original Message
RE: Small IDHT tube cathode bypassing
Posted by cpotl on July 9, 2015 at 06:24:43:
Based on you response, I think you do not understand the basic principles involved. You surely cannot dispute that the different sounds, if they are real, are the result of different audio signals appearing across the bypass capacitor? If the cathode resistor is bypassed properly, there will be a negligible audio signal across the capacitor. If it is not done properly, because of a bad choice of capacitor, or insufficient capcacitance, there will be an audio signal, almost certainly frequency dependent, and that will imply a colouration of the sound from the amplifier. Now, you may like that sound, and there is nothing wrong with that, but it does then mean that you like to achieve a "sound effect" via a non-ideal bypassing of the cathode resistor.
It is as simple as that.Chris