. The Bell System technical journal . Fig. 14 — Example of PI carrier line network. wiring boards. They are potted with an asphalt compound in a cyhndri-cal ahiminum can. The voice frequency transformers are wound on lam-inated core structures of permalloy. The units are potted in an epoxyresin in rectangular aluminum cans. The terminal plate carrying thewire terminals for mounting is a cast unit of a styrene polyester. Bothtypes of transformer are shown in Fig. 13. Ldne Networks and Filters Also deserving mention is a new series of line networks andfilters (which do not form part of eithe
. The Bell System technical journal . Fig. 14 — Example of PI carrier line network. wiring boards. They are potted with an asphalt compound in a cyhndri-cal ahiminum can. The voice frequency transformers are wound on lam-inated core structures of permalloy. The units are potted in an epoxyresin in rectangular aluminum cans. The terminal plate carrying thewire terminals for mounting is a cast unit of a styrene polyester. Bothtypes of transformer are shown in Fig. 13. Ldne Networks and Filters Also deserving mention is a new series of line networks andfilters (which do not form part of either the terminal or repeater equip-ment) with specific functions described in Section 7. All of the networkshave been designed with the same tj^pe mounting arrangement shoRTiin Fig. 14 with two sizes used depending on the number of componentshoused. The networks are cast in a styrene poh^ester. High voltage pro-tection is self-contained and sturdy terminals are provided for bridlewire connection. By means of side slots in the casting
Size: 1426px × 1752px
Photo credit: © Reading Room 2020 / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookcentury1900, bookdecade1920, booksubjecttechnology, bookyear1
