pdf 852-220-102 i2 - 500 Series Transmission C and D Sets - Small-File Popular
By Paul F 1688 downloads
852-220-102-i2-500_Series_Transmission_C_D_Sets_Small-File_tl.pdf
October 1956. (Renumbered from AB022.660.3) Electrical characteristics and transmission performance of the 500 and 501 C and D sets. Crosstalk and sidetone considerations and effects of longitudinal noise and set unbalance. (Using 425B network with varistors.) Circuit description and diagram.
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