544-B
The General Radio 544-B Megohm Bridge was introduced in 1939 Catalog K1 and remained available through Catalog R 1963.
The Type 544-B Megohm Bridge is a null instrument using a Wheatstone bridge circuit. It uses a built in vacuum tube volt meter as a detector and an AC power supply for both VTVM and the Unknown voltages. Its comes installed in an oak hardwood case with operating instructions attached to the inside of its cover. A flexible jack with lead is mounted in the cover for checking the internal standards as explained in the manual.
Specifications
- Range: 0.1 MΩ to 1,000,000 MΩ.
- Accuracy: ±3% on the 0.1, 1, and 10 multipliers; ±4% on the lOO and 1000 multipliers.
- Output Voltage AC Supply: 100 V or 500 V Jumper Selectable.
- Short Circuit Current AC Supply: 12 mA.
Links
- Experimenter describing Type 544-B July 1937
- Experimenter describing Type 544-B June 1939
- Experimenter describing Type 544-B February 1940
