. The Bell System technical journal. Telecommunication; Electric engineering; Communication; Electronics; Science; Technology. EFFECT OF ^7o SHIFT DOWNWARD OF RESONANT FREQUENCIES OF L| Cj, L4C4 AND L5C5 MESHES REQUIREMENTS NORMAL CHARACTERISTIC. 27 28 29 30 31 FREQUENCY IN KILOCYCLES Fig. 6—Attenuation characteristics of 38-N filter, showing effect of element variation. 25 kc, the separation was only 1 per cent. This requirement necessi- tated very steep slopes of the attenuation characteristic, especially for the higher frequency filters; at these slopes a frequency shift of 1/2 per cent pro
. The Bell System technical journal. Telecommunication; Electric engineering; Communication; Electronics; Science; Technology. EFFECT OF ^7o SHIFT DOWNWARD OF RESONANT FREQUENCIES OF L| Cj, L4C4 AND L5C5 MESHES REQUIREMENTS NORMAL CHARACTERISTIC. 27 28 29 30 31 FREQUENCY IN KILOCYCLES Fig. 6—Attenuation characteristics of 38-N filter, showing effect of element variation. 25 kc, the separation was only 1 per cent. This requirement necessi- tated very steep slopes of the attenuation characteristic, especially for the higher frequency filters; at these slopes a frequency shift of 1/2 per cent produced a change in attenuation of 9 or 10 db, as may be ob- served in Fig. 6. As the precision of adjustment for condensers was three or four times that for coils, it was obvious that some improvement in coil construction or adjustment would have to be made. Furthermore, since the important limiting factors in the adjustment of both coils. 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: 1301px × 1921px
Photo credit: © Library Book Collection / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookcentury1900, bookdecade1920, booksubjecttechnology, bookyear1
