. The Bell System technical journal. Telecommunication; Electric engineering; Communication; Electronics; Science; Technology. 528 BELL SYSTEM TECHNICAL JOURNAL The calculation is based on the following assumptions (Fig. A2-2): 1. The output cavity has inner diameter .180", outer .850", conse>j quently a characteristic admittance Go : Go = 7250/log J = 10,710 micromhos (A2-1] 2. The gap capacitance is that of a parallel plate condenser of .180" diameter and .012" spacing, namely C22 = tnA/d= mm/ (A2-2) 3. The effect of the glass vacuum envelope is neglected for sim
. The Bell System technical journal. Telecommunication; Electric engineering; Communication; Electronics; Science; Technology. 528 BELL SYSTEM TECHNICAL JOURNAL The calculation is based on the following assumptions (Fig. A2-2): 1. The output cavity has inner diameter .180", outer .850", conse>j quently a characteristic admittance Go : Go = 7250/log J = 10,710 micromhos (A2-1] 2. The gap capacitance is that of a parallel plate condenser of .180" diameter and .012" spacing, namely C22 = tnA/d= mm/ (A2-2) 3. The effect of the glass vacuum envelope is neglected for simplicity. / OOij'i^. E LINES Fig. A2-2.—Output cavity dimensions. A, B are concentric cylindrical portions. Actual lines of electric force are partly dotted into sketch. (Consequently the length 1 of the line is given by the well-known tuning relation C0C22 = Go cot 6 — Gq cot 0)1 (A2-3) The distributed capacitance of the line is determined from the formulas (3) of the text, which in this case reduces to the following: ?^ I 1 4- '^L^ 1 2~V "^"gT/ -CV2 = -2-11 + o;C22 (A2-4) The cavity distributed capacitance is thus comparatively easy to calcu- late at high frequencies because of the simplicity of the geometry. At low frequencies the computation of the distributed capacity of a coil is no. 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. ]
Size: 1338px × 1867px
Photo credit: © Library Book Collection / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookcentury1900, bookdecade1920, booksubjecttechnology, bookyear1
