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1803-A: Difference between revisions
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The {{Title|General Radio 1803-A Vacuum-Tube Voltmeter}} was available in {{Catalog M}} only. | The {{Title|General Radio 1803-A Vacuum-Tube Voltmeter}} was available in {{Catalog M}} only. | ||
The Type 1803-A is | The Type 1803-A is an AC vacuum-tube voltmeter with a range from 0.1 to 150 V<sub>RMS</sub> at frequencies to 100 MHz without corrections. | ||
Except on the lowest range, it is peak-reading, but the scales are calibrated in RMS volts for sinusoidal voltages. | |||
The 1803-A features a hard-wired probe containing a dual-diode vacuum tube rectifier. From 20 Hz to about 100 MHz, accuracy is ±3% but the instrument is usable up to 200 MHz, refer to the manual for details. | |||
==Specifications== | ==Specifications== | ||
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* '''Voltage Range:''' 0.1 to 150 V<sub>RMS</sub> | * '''Voltage Range:''' 0.1 to 150 V<sub>RMS</sub> | ||
* '''Accuracy:''' ±3% of full scale on all ranges | * '''Accuracy:''' ±3% of full scale on all ranges | ||
* '''Input Impedance:''' 7.7 MΩ at low frequencies | * '''Input Impedance:''' 7.7 MΩ at low frequencies (see manual) | ||
* '''Frequency:''' | * '''Frequency:''' 100 MHz; up to 200 MHz with corrections | ||
==Links== | ==Links== | ||
* [[Media:GR Exp 1803-A 04_1950.pdf|Experimenter April 1950 describing Type 1803-A]] | * [[Media:GR Exp 1803-A 04_1950.pdf|Experimenter April 1950 describing Type 1803-A]] | ||
* [[1803-B]] | |||
==Photos== | ==Photos== | ||