. The Bell System technical journal. Telecommunication; Electric engineering; Communication; Electronics; Science; Technology. 554 BELL SYSTFJf TECHNICAL JOURNAL The actual cavity is illustrated in Fig. 1. This is somewhat more com- plicated than a half wave line, but the mode of resonance is essentially the same. The variable capacitor utilizes a thin-walled copper cup which is movable vertically. This cup fits rather closely inside, and is coaxial with, a cvlindrical hole in the main bodv of the cavitv. It forms the center SPEAKER TYPE MAGNET SUPPORT SPRINGS PAPER TUBE. WAVEGUIDE OUTPUT ANOD
. The Bell System technical journal. Telecommunication; Electric engineering; Communication; Electronics; Science; Technology. 554 BELL SYSTFJf TECHNICAL JOURNAL The actual cavity is illustrated in Fig. 1. This is somewhat more com- plicated than a half wave line, but the mode of resonance is essentially the same. The variable capacitor utilizes a thin-walled copper cup which is movable vertically. This cup fits rather closely inside, and is coaxial with, a cvlindrical hole in the main bodv of the cavitv. It forms the center SPEAKER TYPE MAGNET SUPPORT SPRINGS PAPER TUBE. WAVEGUIDE OUTPUT ANODE 'â CONNECTION I'"ifi. 1.âConstruction of the oscillator. conductor of a low impedance coaxial line approximately one-fourth wavelength long, so that in this frequency range it is eflfectively short- circuited to the cavity wall. Vertical motion of the cup is therefore roughly equivalent to moving the end wall, thereby changing the capacitance between the wall and the center conductor of the main cavity. The reso-. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original American Telephone and Telegraph Company. [Short Hills, N. J. , etc. , American Telephone and Telegraph Co. ]
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Keywords: ., bookcentury1900, bookdecade1920, booksubjecttechnology, bookyear1
