TM Number
Title
MM Number
Date
File Case
TM22-307-5 Equalizer for Phonograph Recorder. MM-307-5 7/14/22
31829
TM22-327-5 Equalizer for Aeolian Hall Radio Broadcasting Amplifiers and Cable Circuit. MM-327-5 7/25/22
31558
TM22-473-4 Characteristics of #13 Gauge Paper Insulated Cable at Carrier Frequencies. MM-473-4 12/26/22
30946-16
TM23-649-5 Non-Dissipative Band Elimination Equalizer Having no Frequency or Infinity Attenuation. MM-649-5 5/14/23
30272
TM23-689-6 Use of Straight Core Coils in Filter. MM-689-6 6/22/23
11345
TM23-714-7 Impedance Transforming Wave Filter Sensation. MM-714-7 7/17/23
30272
TM23-732-9 New Type Band Pass Wave Filter Section Designed to Work better. 2 unequal Impedances with the Same Efficiency as Symmetrical Type Section and Ideal Transformers. MM-732-9 7/31/23
30272
TM23-790-8 Impedance Transforming Wave Filter Sections. MM-790-8 10/17/23
30272
TM23-824-7 A Theory for the Design of Loud Speakers. MM-824-7 11/23/23
32184
TM24-756-4 Method of Obtaining the Actual Impedance of any Filter. MM-756-4 1/28/24
30272
TM24-962-5 Use of the Negative Elasticity of the Field in Loud Speaker Lectures. MM-962-5 4/22/24
32184
TM24-990-6 Tapered Lines with Lumped Constants. MM-990-6 5/20/24
32184
TM24-1085-7 Theory of Magneto-Mechanical Motor Elements. MM-1085-7 9/27/24
32184
TM25-1163-8 Equivalent Circuits for Magneto Mechanical Networks. MM-1163-8 1/2/25
32184
TM25-0-1212 Constant Amplitude Motor Elements. MM-1212 3/19/25
14212
TM25-0-1376 Equalizer for Optical Recording of Speech and Music. MM-1376 9/21/25
31976
TM26-0-1444 Tests on Westinghouse Electric Reproducer. MM-1444 1/7/26
32187
TM26-0-1457 Air Chambers for Phonographs and Loud Speakers. MM-1457 1/22/26
33066
TM26-0-1521 Impedance Matching of Reproducer #4. MM-1521 4/22/26
32364
TM26-0-1525 Proper Mouth Opening for An exponential Horn. MM-1525 4/26/26
33066
TM26-0-1612 Measurements of English Gramaphone Co. Reproducer No. 4. MM-1612 7/25/26
181820
TM26-0-1680 Design of Finite Networks for Uniform Frequency Characteristic. MM-1680 11/3/26
33066
TM27-0-1737 Solid Tungsten Needles. MM-1737 1/11/27
33218
TM27-0-1798 Design of Equalizers Having Compensating Frequency Characteristics. MM-1798 3/16/27
32364
TM27-0-1825 Viscosity Damping. MM-1825 4/20/27
33061
TM27-0-1862 Compensating Equalizers for Vitaphone Recording. MM-1862 5/23/27
33218
TM27-0-1869 Electrostatic Transmitter or Receiver. MM-1869 6/2/27
32184
TM27-0-1872 Air Chambers for Phonographs and Loud Speakers. MM-1872 6/8/27
33066
TM27-0-1905 The Hyperbolic Cosine Horn. MM-1905 7/0/1927
33066
TM27-0-1951 Equivalent Circuit for Carbon Transmitter. MM-1951 9/15/27
30943-1
TM27-0-1975 Electrostatic Transmitter. MM-1975 10/17/27
32184
TM27-0-2007 Attenuation in All Pass Networks. MM-2007
12/00/1927
18199
TM28-0-2053 Experimental Comparison of Hyperbolic Cosine Horn with Exponential Type. MM-2053 3/5/28
33066
TM28-0-2095 Insertion Phase of Filters. MM-2095 4/20/28
18199
TM28-0-2184 Air Chambers for Phonograph and Loud Speaker. MM-2184 8/6/28
33066
TM28-0-2233 Transatlantic Radio Telephone at Rocky Point. MM-2233 10/23/28
19588
TM29-0-2392 Distortion Correction for Resistance Coupled Amplifier. MM-2392 4/8/29
320057-5
TM29-0-2415 Proposed Two Channel Long Wave Radio Telephone System Coupling Network. MM-2415 4/29/29
20121
TM29-0-2486 Coupling Circuits for 2-Channel Long Wave Radio Transmitter. MM-2486 7/5/29
34653
TM30-0-2821 Wave Antenna Coupling Networks. MM-2821 6/7/30
34653
TM30-0-2822 Multi-tuned Antenna Coupling Circuit. MM-2822 6/9/30
34653
TM30-0-2844 A Chart method for Filter Design. MM-2844 6/17/30
19878
TM30-0-2886 A Tight of Constant Loss Network. MM-2886 8/22/30
19878
TM30-0-2964 A Modified Campbell Artificial Line. MM-2964 9/25/30
19878
TM31-0-3069 Multiple Transformers. MM-3069 1/20/31
19878
TM31-0-3159 Study of Dial Interference. MM-3159 4/8/31
31346
TM31-0-3208 Attenuation & Phase Correction in Non-Loaded Cable Circuits. MM-3208 5/9/31
19566
TM31-0-3232 Variable Equalizer. MM-3232 5/20/31
19878
TM31-0-3260 Vibrating String Filter. MM-3260 6/12/31
19879
TM31-0-3376 Vibrating String Filter. MM-3376 9/18/31
19878
TM31-0-3378 The Study of Circuit Conditions as a Means of Reducing the Number of Tests on Ringers. MM-3378 9/21/31
33064
TM31-0-3393 Use of Complex M's and Real M in Filter Design. MM-3393 10/8/31
19878
TM31-0-3483 Proposed Modification of T.A.R. Coupling Circuits. MM-3483 12/21/31
34653-2
TM31-0-3482 Note on Adjustment of Crystals by External Condensers. MM-3482 12/21/31
19879
TM31-0-3505 Constant Resistance Fitting. MM-3505 12/29/31
19878
TM32-0-3507 Theory of the Vibrating String and its Shunt Equalizer. MM-3507 1/11/32
19878
TM32-0-3561 Phase Equalizers for Transforming. MM-3561 3/2/32
19878
TM32-0-3593 A Method of Computing the Insertion and Phase of a Lattice Network. MM-3593 3/30/32
19878
TM32-0-3653 Constant Resistance Line for Directional Filters. MM-3653 5/24/32
19878
TM33-0-3864 Shunt Resistance Loading for Cables. MM-3864 3/15/33
20178
TM33-0-3906 Feed Back Equalizer for 50 - 500 KC Line Amplifier. MM-3906 5/10/33
20247
TM33-0-3999 An Extension of the Theory of Tapered Lines. MM-3999 8/15/33
19878
TM33-0-4002 Application of Low and Intermediate Frequency Mechanical Filters. MM-4002 8/16/33
19879
TM33-0-4096 Constant Resistance Filters. MM-4096 12/28/33
19878
TM34-5-70 Development of the Long Range Subscribers' Dialing Circuit for the Cross Bar Sender. 4/9/34
35550-1
TM34-5-180 Present Status of Work on Case 22108 Transmission Research on Signaling Circuits and Mechanisms. 8/13/34
22108
TM35-5-87 Chatter in U-Type Relays. 4/29/35
22108
TM35-5-156 Contact Protection in Inductive Circuits. 8/19/35
22108
TM35-5-160 Field Measurement of the Percentage Break of a Dial. 8/21/35
22108
TM35-5-174 Eddy Currents in Rectangular Cores. 9/10/35
22108
TM35-5-172 The Inverse Network of a Metallic Core Coil with Eddy Currents. 9/11/35
19878
TM36-5-103 Dynamical Theory of the Polar Relay. 6/2/36
22108
TM37-325-54 A Voice Frequency Signalling Method for Subscriber Use. 5/13/37
22108
TM37-325-93 A Modification of a Proposed Voice Frequency Signalling Method. 7/22/37
22108
TM37-325-98 Reduction of Chatter in 209-F-A Relay. 8/5/37
22108
TM38-325-33 Dynamics of the Neutral Relay. 3/2/38
37190
TM38-325-70 A New Form of Pulse Machine and Its Use to Measure Flux under Dynamic Conditions. 4/27/38
37190
TM38-325-186 A New Flux Measuring Machine. 12/19/38
37190
TM39-0-2372 Impedance Measurements at Rodey Pt. Transatlantic Radio Station. MM-2372 3/20/39
19588
TM39-325-116 The Power Efficiency on Non-Polarized Electromagnetic Structures. 7/27/39
22108
TM39-325-126 Displacement and Velocity Measurement. 8/16/39
22108-1
TM39-325-130 An Improved Form of Vaccuum Tube Filter. 8/23/39
22108-1
TM40-130-89 An Experimental Investigation of the Dynamics of an Electromagnet. 4/18/40
22108-1
TM40-130-144 Measurement on Selector Switch Using 221 Type Magnet. 6/26/40
22108-1
TM40-130-176 Some Efficiency Tests on a U Type Relay. 8/27/40
22108-1
TM41-130-40 A Portable Flux Meter. 2/26/41
22108-1
TM41-130-113 A Line Operated Amplifier With Uniform Gain Extending Down to Direct Current. 5/27/41
22108-1
TM47-110-1 Servo Amplifier for Roll. 1/9/47
26500-6
TM47-110-31 Nike Roll and Steering Servo Amplifiers. 5/15/47
26500-6
TM49-8750-24 Detailed Review of the Control System for the NIKE 48-1 Missiles. 6/15/49
26500
TM52-3200-62 Visit to MIT to attend Demonstration of Automatic Milling Machine. 9/23/52
37943
TM54-2334-10 A Proposed Program for the Development of Automatic Methods for Assembly and Wiring. 5/13/54
37943-11

TM Number: Technical Memorandum number. Bell Laboratories current cataloging system.

MM Number: Old cataloging system

File Case: Project number. Documents are stored by File Case in the AT&T Archives.


Don H. Johnson
08/15/2001