716-C

The General Radio 716-C Capacitance Bridge was introduced in Catalog L (1948) and remained available through Catalog U (1970).

The Type 716-C capacitance bridge uses the Schering circuit and is direct reading at five frequencies, 100 Hz, 1 kHz, 10 kHz, and 100 kHz. Dissipation factor is direct reading at 1 kHz but the usable range is greater, see the manual. Capacitance measurements can be made by the direct or substitution methods. When using the substitution method a balancing capacitor is required that is 100 pF greater than the unknown, the Types 505 and 509 are recommended. Inductance and Q of large inductors can be measured by the substitution method. The 716-C requires a generator and detector, the Types 1310-A or 1311-A oscillators and 1232-A null detector are recommended.

The Type 716-C is the last instrument in 716 series being replaced by the Type 1615-A.

Specifications

• Capacitance Range: Direct method, 100 to 1150 pF; Substitution method 0.1 to 1050 pF
• Accuracy: ±0.1%
• Dissipation Factor Range: 0.00002 to 0.56
• Accuracy: ±2%
• Frequency: 30 Hz to 300 kHz; useful up to 1 MHz with corrections

Links

• Experimenter describing Type 716-A December 1936
• Experimenter describing Type 716-B April 1942
• Experimenter describing Type 716-C April 1947

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