. The Bell System technical journal . TAPERED BRASS PIN POLYSTYRENETAPE INTERMEDIATE FREQUENCY ^ AND DIRECT CURRENT OUTPUT DETAIL OFCOAXIAL CONDENSERASSEMBLY , I Fig. 3—Schematic diagram of one of the early crystal converter blocks. The inserts and points in appropriate mounting blocks were widely usedin centimeter wave investigations prior to The principal laboratoryuses were in frequency converter circuits in receivers, and as radio fre- 2 G. C. Southworth and A. P. King, Metal Horns as Directive Receivers of Ultra-short Waves, Proc. L R. E. v. 27, pp. 95-102, 1939; Carl R. Englund, D
. The Bell System technical journal . TAPERED BRASS PIN POLYSTYRENETAPE INTERMEDIATE FREQUENCY ^ AND DIRECT CURRENT OUTPUT DETAIL OFCOAXIAL CONDENSERASSEMBLY , I Fig. 3—Schematic diagram of one of the early crystal converter blocks. The inserts and points in appropriate mounting blocks were widely usedin centimeter wave investigations prior to The principal laboratoryuses were in frequency converter circuits in receivers, and as radio fre- 2 G. C. Southworth and A. P. King, Metal Horns as Directive Receivers of Ultra-short Waves, Proc. L R. E. v. 27, pp. 95-102, 1939; Carl R. Englund, Dielectric Con-stants and Power Factors at Centimeter Wave Lengths, Bell Sys. Tech. Jour., v. 23, , 1944; lirainerd, Koehler, Reich, and WoodrulT, Ultra High Frequency Tech-niques, D. Van Nostrand Co., Inc., 250-4th Avenue, New York, 1942. SILICON CRYSTAL RECTIFIERS 7 quency instrument rectifiers. They were also used to a relatively minorextent in some of the early radar test equipment. Moreover, the avail-ability of these
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