pdf 852-220-101-i1-500 Series Transmission A B J K Sets Tl Popular

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852-220-101-i1-500_Series_Transmission_A_B_J_K_Sets_tl.pdf

852-220-101-i1-500 Series Transmission A B J K Sets Tl
May 1952. Electrical characteristics and transmission performance of the 500 and 501 A, B, J and K sets.  Crosstalk and sidetone considerations and effects of longitudinal noise and set unbalance.  (With and without 311A equalizer.)  Circuit description and diagram.

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