| tape recording | Magnetic Recording |
| tape response | Tape Response |
| termination | Line Impedance |
| tetrode | Development of the Pentode |
| | The Beam-Power Tetrode |
| time constant | Time Constants |
| time-base | Showing Waveforms with the Oscilloscope |
| tone control | Tone Controls |
| transconductance | Transconductance |
| | Plate Resistance |
| transformer | The Microphone Matching Transformer |
| | The Matching Transformer |
| | The Effect of a Step-Up Transformer |
| | Input Transformers |
| | The Transformer-Type Phase Splitter |
| | Review of Transformer Action |
| | Core Losses |
| | The Effect of Saturation |
| | The Use of an Air Gap |
| | Input and Interstage Transformers |
| | Drive Transformers |
| | Output Transformers |
| | Souces of Power |
| transformer coupling | Transformer Coupling |
| transient | Transients |
| | Transients Due to Power Supply |
| transient distortion | Transient Distortion |
| transistor | Transistor Operation |
| | Noise In Tubes and Transistors |
| transistor amplifier | The Grounded-Base Amplifier |
| | The Grounded-Emitter Amplifier |
| | The Grounded-Collector Amplifier |
| treble tone control | Tone Controls |
| triode | The Triode |
| | Different Types of Triodes |
| | Triode Connection of Pentodes |
| tube | Noise In Tubes and Transistors |
| tube characteristics | Different Types of Triodes |
| tube rectifier | Rectification |
| turntable | The Effects of Wow, Flutter, and Rumble |
