| 1/00 | Details of arrangements for controlling amplification |
| 1/02 | Details of arrangements for controlling amplification Remote control of amplification, tone, or bandwidth (remote control in general G05, G08; combined with remote tuning or selection of resonant circuits H03J) |
| 1/04 | Details of arrangements for controlling amplification Modifications of control circuit to reduce distortion caused by control (modifications to reduce influence of variations of internal impedance of amplifying elements caused by control H03F 1/08) |
| 3/00 | Gain control in amplifiers or frequency changers (gated amplifiers H03F 3/72; peculiar to television receivers H04N) |
| 3/02 | Gain control in amplifiers or frequency changers (gated amplifiers H03F 3/72; peculiar to television receivers H04N) Manually-operated control |
| 3/04 | Gain control in amplifiers or frequency changers (gated amplifiers H03F 3/72; peculiar to television receivers H04N) Manually-operated control in untuned amplifiers |
| 3/06 | Gain control in amplifiers or frequency changers (gated amplifiers H03F 3/72; peculiar to television receivers H04N) Manually-operated control in untuned amplifiers having discharge tubes |
| 3/08 | Gain control in amplifiers or frequency changers (gated amplifiers H03F 3/72; peculiar to television receivers H04N) Manually-operated control in untuned amplifiers having discharge tubes incorporating negative feedback |
| 3/10 | Gain control in amplifiers or frequency changers (gated amplifiers H03F 3/72; peculiar to television receivers H04N) Manually-operated control in untuned amplifiers having semiconductor devices |
| 3/12 | Gain control in amplifiers or frequency changers (gated amplifiers H03F 3/72; peculiar to television receivers H04N) Manually-operated control in untuned amplifiers having semiconductor devices incorporating negative feedback |
| 3/14 | Gain control in amplifiers or frequency changers (gated amplifiers H03F 3/72; peculiar to television receivers H04N) Manually-operated control in frequency-selective amplifiers |
| 3/16 | Gain control in amplifiers or frequency changers (gated amplifiers H03F 3/72; peculiar to television receivers H04N) Manually-operated control in frequency-selective amplifiers having discharge tubes |
| 3/18 | Gain control in amplifiers or frequency changers (gated amplifiers H03F 3/72; peculiar to television receivers H04N) Manually-operated control in frequency-selective amplifiers having semiconductor devices |
| 3/20 | Gain control in amplifiers or frequency changers (gated amplifiers H03F 3/72; peculiar to television receivers H04N) Automatic control (combined with volume compression or expansion H03G 7/00) |
| 3/22 | Gain control in amplifiers or frequency changers (gated amplifiers H03F 3/72; peculiar to television receivers H04N) Automatic control (combined with volume compression or expansion H03G 7/00) in amplifiers having discharge tubes |
| 3/24 | Gain control in amplifiers or frequency changers (gated amplifiers H03F 3/72; peculiar to television receivers H04N) Automatic control (combined with volume compression or expansion H03G 7/00) in amplifiers having discharge tubes Control dependent upon ambient noise level or sound level |
| 3/26 | Gain control in amplifiers or frequency changers (gated amplifiers H03F 3/72; peculiar to television receivers H04N) Automatic control (combined with volume compression or expansion H03G 7/00) in amplifiers having discharge tubes Muting amplifier when no signal is present |
| 3/28 | Gain control in amplifiers or frequency changers (gated amplifiers H03F 3/72; peculiar to television receivers H04N) Automatic control (combined with volume compression or expansion H03G 7/00) in amplifiers having discharge tubes Muting amplifier when no signal is present in frequency-modulation receivers |
| 3/30 | Gain control in amplifiers or frequency changers (gated amplifiers H03F 3/72; peculiar to television receivers H04N) Automatic control (combined with volume compression or expansion H03G 7/00) in amplifiers having semiconductor devices |
| 3/32 | Gain control in amplifiers or frequency changers (gated amplifiers H03F 3/72; peculiar to television receivers H04N) Automatic control (combined with volume compression or expansion H03G 7/00) in amplifiers having semiconductor devices the control being dependent upon ambient noise level or sound level |