Telephone Circuit Unbalances; Bell Telephone System reprint B-134-I, July 1925. L. P. Ferris, R McCurdy.

Telephone Circuit Unbalances; Bell Telephone System reprint B-134-I, July 1925.

Bell Telephone System 1925, 35 pages, illustrations, photographs.

Condition: Very Good, light blue heavy paper covers, stapled wraps, three-hole punched at margin, sound and secure, pages clean and unmarked.

Price: $5.00

Item Description

A discussion of telephone circuit unbalances from standpoint of effects on noise and crosstalk and a description of methods for determining the magnitudes and locations of the unbalances.