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CATEGORY INDEX SIG For Bvnopaia see page No. Multiple Switchboards—Installation and Operation TF 11-1555 (24 min—1949—Film Reference) 337 Theory of Simplex and Phantom Circuits—Part I: Balanced Conditions TF 11-2062 (14min—1944—Film Reference) 341 Theory of Simplex and Phantom Circuits—Part II: Un- balanced Conditions TF 11-2063 (19 min—1944—Film Reference) 341 The Step by Step Switch—197-type Selector (Parts 1, 2, and 3) MF 11-8054 (69 min—1954—Commercial Adaptation) 213 Manual Teletypewriter Operation and Procedures—Part I: Teletypewriter Operation TF 11-1882 (9 min—1953—Film Reference) 340 Manual Teletypewriter Operation and Procedures—Part II— Teletypewriter Procedure and Preparation of Message TF 11-1883 (16min—1954—Film Reference) 340 Manual Teletypewriter Operation and Procedures—Part III —Single and Multiple Calls—Making Corrections and Repetitions TF 11-1884 (8 min—1953—Film Reference) 340 Manual Teletypewriter Operation and Procedures—Part TV —Maintenance and Summary TF 11-1885 (11 min—1954—Film Reference) 340 Teletypewriter Sets EE-97-A and EE-9a-A—Part I: Field Installation TF 11-1228 (14min—1943—Film Reference) 335 Teletypewriter Sets EE-97-A and EE-9a-A—Part II: Field Testing TF 11-1229 (15 min—1943—Film Reference) 335 Teletypewriter Sets EE-97-A and EE-98-A—Part III: AC Installation TF 11-230 (10 min—1943—Film Reference) 335 Line-up of Field Teletypewriter Set EE-98-A TF 11-1839 (8 min—1953—Film Reference) 340 Communication Center—Procedure for Corps and Lower Headquarters—Part I: Outgoing Messages TF 11-1733 (17 min—1951—Film Reference) 339 Communication Center Procedures for Corps and Lower Headquarters TF 11-1734 (7min—1951—Film Reference) 339 The Army Command and Administrative Network—Part I— Network Facilities TF 11-2317 (20 min—1956—Replaces TF 11-1648) 343 Large Communication Centers—Part II: Tape Relay Pro- cedures TF 11-1649 (21 min—1951—Film Reference) --- 338 Fundamentals of Carrier Telephony—Part I: Principles and Applications TF 11-2088 (13 min—1945—Film Reference) 342 AGO 10118B 127