546-C: Difference between revisions
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{{GR Product | {{GR Product | ||
|model=546-C | |model=546-C | ||
|codes=CROWN | |||
|class=meters | |class=meters | ||
|summary=Audio-Frequency Microvolter | |summary=Audio-Frequency Microvolter | ||
| Line 15: | Line 16: | ||
The {{Title|General Radio 546-C Audio-Frequency Microvolter}} was introduced in {{Catalog L}} and remained available through {{Catalog T}}. | The {{Title|General Radio 546-C Audio-Frequency Microvolter}} was introduced in {{Catalog L}} and remained available through {{Catalog T}}. | ||
It is an audio-frequency voltage divider and attenuator, an updated version of the earlier [[546-B]] with changes being improvements to the meter, and adoption of the 600 Ω impedance standard for audio applications. | |||
The primary application of the 546-C is to supply audio-frequency voltages at attenuated and calibrated levels, but it can also be used to measure unknown voltages by "Substitution" and "Insert-Voltage" methods. | |||
Any audio oscillator that can supply 2.2 V into 600 Ω will be sufficient to drive the Microvolter. | |||
==Specifications== | ==Specifications== | ||
* '''Output Voltage Range:'''0.5 μV to 1.0 V, with 2.2 V input voltage | * '''Output Voltage Range:''' 0.5 μV to 1.0 V, with 2.2 V input voltage | ||
* '''Accuracy:''' For open-circuit output voltages | * '''Accuracy:''' For open-circuit output voltages, calibration is accurate within ±(3% + 0.5 μV) for output settings above 1 μV and for all frequencies between 20 and 20,000 Hz | ||
* '''Output Impedance:''' approximately | * '''Output Impedance:''' approximately 600 Ω ±5% | ||
* '''Input Impedance:''' approximately | * '''Input Impedance:''' approximately 600 Ω | ||
==Links== | ==Links== | ||
* [[Media:GR Exp 546-C 06_1948.pdf|Experimenter describing Type 546-C | * [[Media:GR Exp 546-C 06_1948.pdf|Experimenter June 1948 describing Type 546-C]] | ||
==Photos== | ==Photos== | ||
Latest revision as of 00:54, 26 April 2024
The General Radio 546-C Audio-Frequency Microvolter was introduced in Catalog L (1948) and remained available through Catalog T (1968).
It is an audio-frequency voltage divider and attenuator, an updated version of the earlier 546-B with changes being improvements to the meter, and adoption of the 600 Ω impedance standard for audio applications.
The primary application of the 546-C is to supply audio-frequency voltages at attenuated and calibrated levels, but it can also be used to measure unknown voltages by "Substitution" and "Insert-Voltage" methods.
Any audio oscillator that can supply 2.2 V into 600 Ω will be sufficient to drive the Microvolter.
Specifications
- Output Voltage Range: 0.5 μV to 1.0 V, with 2.2 V input voltage
- Accuracy: For open-circuit output voltages, calibration is accurate within ±(3% + 0.5 μV) for output settings above 1 μV and for all frequencies between 20 and 20,000 Hz
- Output Impedance: approximately 600 Ω ±5%
- Input Impedance: approximately 600 Ω
