![]() ![]() In spite of my efforts, I could not go beyond the wall of Sound and my soldering iron was always in its heated state. I still remember that I was trying to make up an ideal circuit so as to produce a good ![]() Reality, instead of focusing on the sound itself. At such an inexperienced age, one tends to concentrate on a meeting point, where theory seems to meet When I was only 20 years old, I concentrated my energies on the study of It was like the advancedĮvolution of dinosaurs at the close of the dinosaurian age. ![]() Next, we must carefully select the components which areĪt the closing stage of the vacuum tube amplifier age, tube circuit technology was in a highly advanced state. To eliminate mechanical sound? First, we must simplify the audio circuitry. It is an interesting discovery that when mechanical sounds are thoroughly eliminated, we can reproduce live sound. There are many factors which can produce mechanical sound A mechanical sound will paralyze the listener's senses when listening to the music for an extended period of All listeners would agree that natural sound must Sound" or that it means a sound "alike to live sound". There may be differing opinions - such as "natural" means a sound "without mechanical The meaning of "natural sound" depends on the interpretation of What does 'good sound' mean? There may be a variety of interpretations. This fact demonstrates the excellent performance of this family of vacuum tubes. Of the driver stage is satisfactory, the single triode power amplifier possesses an unbelievably law distortion characteristic, even in theĪbsence of negative feedback. In particular, the large triode vacuum tube functions mare perfectly when dealing with low level signals, allowing the tone quality to be clear and distinct. "stray electrons" around the heater is greatly decreased, thereby allowing the vacuum tube to work When high plate voltage is employed and the pitch of the grid is made more coarse, the amount of This type of vacuum tube is very sturdy and promisesĪ high vacuum integrity, since it was originally intended for demanding commercial and military applications. "pitch" is used for the grid winding geometry. Larger diameter wire is used for the heater, the grid to heater spacing is considerable, and coarse TheĮg-Ip characteristic of the 211 and its brothers is more linear than most other power However, it is only large triodes like the 211 that provide the best performance that vacuum tubes can offer. The wiring so as to prevent hands from getting electric shock if one reaches into the amplifier. In manufacturing the amplifier, we must pay utmost attention to moisture-proofing the chassis and proper insulation of The power supply circuit cannot be normally designed, since the supply voltage required for the 211 tube must be approximatelyġ000V. This type of amplifier is a challenge from the viewpoint of the Perhaps this is the reason why thereĪre only a few amplifiers that employ the 211 tube today. The 211 may appear old-fashioned and unsophisticated to high-brow maniacs for audio equipment. T he 211 creates a formidable impression because of its shape. Article by Hiroyasu Kondo-san, Audio Note ![]()
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