1631-A

The General Radio 1631-A Inductance Bridge appeared in Catalog L (1948) only.

The Type 1631-A is portable service grade inductance measuring device using the Maxwell bridge circuit. It accomplishes this without the use of any vacuum tubes. The generator used is "Hummer" type operating at 1000 Hz and the detector being a set of headphones. The microphone hummer oscillator is the Type 572-B. The power for the hummer oscillator is a pair Burgess F2BP suppling 6 volts mounted inside its walnut case.

Specifications

• Inductance Range: 10 μH to 100 H in 3 ranges
• Inductance Accuracy: ±2.5% of dial reading between 100 μH and 10 H. See Manual
• Q Range: 1 to 45
• Q Accuracy: ±10% of dial reading for values of Q between 2 and 10. See Manual

Links

• Experimenter February 1946 describing Types 1614-A and 1631-A

Photos

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  Hummer Oscillator

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  Hummer Oscillator