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| Class Numbers & Titles | Class Numbers Only | USPC Index | International | HELP |
| You are viewing a USPC Schedule. |
| Class 331 | OSCILLATORS |
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![]() | ![]() | 94.1 | MOLECULAR OR PARTICLE RESONANT TYPE (E.G., MASER) |
![]() | | 1R | AUTOMATIC FREQUENCY STABILIZATION USING A PHASE OR FREQUENCY SENSING MEANS |
![]() | ![]() | 2 | Plural oscillators controlled |
![]() | ![]() | 3 | Molecular resonance stabilization |
![]() | ![]() | 4 | Search sweep of oscillator |
![]() | ![]() | 5 | Magnetron oscillator |
![]() | ![]() | 6 | Klystron oscillator |
![]() | ![]() | 8 | Transistorized controls |
![]() | ![]() | 9 | Oscillator with distributed parameter-type discriminator |
![]() | ![]() | 10 | Plural A.F.S. for a single oscillator |
![]() | ![]() | 14 | With intermittent comparison controls |
![]() | ![]() | 15 | Amplitude compensation |
![]() | ![]() | 16 | Tuning compensation |
![]() | ![]() | 17 | Particular error voltage control (e.g., intergrating network) |
![]() | ![]() | 18 | With reference oscillator or source |
![]() | ![]() | 19 | Spectrum reference source |
![]() | ![]() | 20 | T.V. sync type |
![]() | ![]() | 22 | Plural significant heterodyne stages |
![]() | ![]() | 23 | Sensing modulation (e.g., frequency modulation controlled oscillator |
![]() | ![]() | 25 | Signal or phase comparator |
![]() | ![]() | 30 | With stable heterodyne oscillator or source |
![]() | ![]() | 34 | Particular frequency control means |
![]() | ![]() | 35 | Electromechanical (e.g., motor) |
![]() | | 36R | Reactance device (e.g., variable capacitors, saturable inductors, reactance tubes, etc.) |
![]() | ![]() | 1A | AFC with logic elements |
![]() | ![]() | 37 | BEAT FREQUENCY |
![]() | ![]() | 38 | Plural beating |
![]() | ![]() | 40 | Frequency or amplitude adjustment or control |
![]() | ![]() | 41 | Frequency stabilization |
![]() | ![]() | 42 | With particular signal combining means (e.g., cavity mixer) |
![]() | ![]() | 44 | WITH FREQUENCY CALIBRATION OR TESTING |
![]() | ![]() | 45 | POLYPHASE OUTPUT |
![]() | ![]() | 46 | PLURAL OSCILLATORS |
![]() | ![]() | 47 | Oscillator used to vary amplitude or frequency of another oscillator |
![]() | ![]() | 48 | Adjustable frequency |
![]() | ![]() | 49 | Selectively connected to common output or oscillator substitution |
![]() | ![]() | 50 | Cascade or tandem connected |
![]() | ![]() | 51 | Frequency dividers |
![]() | ![]() | 52 | Semiconductor (e.g., transistor) |
![]() | ![]() | 53 | Frequency multiplier |
![]() | ![]() | 54 | Diverse-type oscillators |
![]() | ![]() | 55 | Synchronized, triggered or pulsed |
![]() | ![]() | 56 | Parallel connected |
![]() | ![]() | 57 | RING OSCILLATORS |
![]() | ![]() | 58 | PLURAL FUNCTIONS SIMULTANEOUSLY |
![]() | ![]() | 59 | CONVERTIBLE (E.G., OSCILLATOR TO AMPLIFIER, ETC.) |
![]() | ![]() | 60 | SINGLE OSCILLATOR WITH PLURAL OUTPUT CIRCUITS |
![]() | ![]() | 62 | WITH OSCILLATOR CIRCUIT PROTECTIVE MEANS |
![]() | ![]() | 63 | PROTECTIVE OF SAFETY DEVICES FOR PERSONNEL |
![]() | ![]() | 64 | WITH INDICATOR, SIGNAL, OR ALARM |
![]() | ![]() | 65 | WITH DEVICE RESPONSIVE TO EXTERNAL PHYSICAL CONDITION |
![]() | ![]() | 67 | WITH ELECTROMAGNETIC OR ELECTROSTATIC SHIELD |
![]() | ![]() | 68 | WITH OUTER CASING OR HOUSING |
![]() | ![]() | 70 | WITH TEMPERATURE MODIFIER |
![]() | ![]() | 71 | RAW A.C. USED AS SOURCE OF POWER OR BIAS |
![]() | ![]() | 72 | ELECTRON-COUPLED TYPE |
![]() | ![]() | 74 | COMBINED WITH PARTICULAR OUTPUT COUPLING NETWORK |
![]() | ![]() | 78 | ELECTRICAL NOISE OR RANDOM WAVE GENERATOR |
![]() | ![]() | 79 | BEAM TUBE |
![]() | ![]() | 86 | WITH MAGNETICALLY CONTROLLED SPACE DISCHARGE DEVICE (E.G., MAGNETRON) |
![]() | ![]() | 87 | With particular pulsing means |
![]() | ![]() | 88 | With frequency stabilization |
![]() | ![]() | 89 | With secondary emissive electrode |
![]() | ![]() | 90 | With frequency adjustment |
![]() | ![]() | 91 | With undesired mode suppression or selection means |
![]() | ![]() | 92 | RETARDING FIELD TUBE-TYPE OSCILLATORS (E.G., BARKHAUSEN KURZ) |
![]() | ![]() | 95 | BUTTERFLY RESONATOR |
![]() | ![]() | 96 | WITH DISTRIBUTED PARAMETER RESONATOR |
![]() | ![]() | 103 | TUBE STRUCTURE FORMS INDUCTIVE PART OF RESONANT CIRCUIT |
![]() | ![]() | 104 | TRANSIT TIME OSCILLATOR |
![]() | ![]() | 105 | WITH PARASITIC OSCILLATION CONTROL OR PREVENTION MEANS |
![]() | ![]() | 106 | WITH PERIODOIC OR REPETITIOUS AMPLITUDE VARYING MEANS (E.G., TREMOLO) |
![]() | | 107R | SOLID STATE ACTIVE ELEMENT OSCILLATOR |
![]() | | 108R | Transistors |
![]() | ![]() | 109 | Amplitude stabilization and control |
![]() | ![]() | 110 | Bridge type |
![]() | ![]() | 111 | Relaxation oscillator |
![]() | ![]() | 114 | Push-pull |
![]() | ![]() | 115 | Negative resistance |
![]() | | 116R | Electromechanical resonator controlled |
![]() | ![]() | 116FE | Field-effect transistor active element |
![]() | ![]() | 116M | Electromechanical resonators other than piezoelectric crystals |
![]() | | 117R | L-C type |
![]() | ![]() | 117FE | Field-effect transistor active element |
![]() | ![]() | 117D | Distributed parameter resonator transistor oscillators |
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