Abstracts of Technical Articles by Bell System Authors (01 April 1945)

Abstracts of Technical Articles by Bell System Authors 301 302 BELL SYSTEM TECHNICAL JOURNAL after proper development, are analyzed electrically, making possible a complete analysis on the ground and thereby reducing materially the time devoted to flight test, and also simplifying the process of analysis of complex wave forms. Ultra-Short-Wave Transmitter for the Cape Charles-Norfolk Multiplex System. R . J. KIRCIIER and R . W. FRIIS. Design features of an unattended ultra-short-wave double-sideband multiplex transmitter are described. Forty decibels of envelope feedback is utilized over the 12- to 60-kilocycle band of the twelve type-K carrier-signal channels which modulate the last stage of the transmitter. 

Accessibility of apparatus and ease in maintenance contribute toward obtaining maximum reliability of the equipment in commercial service. Paper Capacitors Containing Chlorinated Impregnants. Stabilization by Anthraquinone? D . A. MCLEAN and L. EGERTON. This paper shows anthraquinone to be an effective stabilizer for capcitors having paper dielectrics containing chlorinated impregnants when aluminum electrodes are used and d-c. potentials are applied. One half per cent of anthraquinone prevents formation of the usual carbonized brown spots in the paper, and diminishes corrosion of electrodes and instability of leakage current. It increases the life under accelerated testing conditions by factors of four to one hundred fold, depending upon materials used and conditions of test.