Decade Capacitance Standard C891/TR

This unusual decade capacitor comprises a low loss 1000 pF air capacitor associated with a two decade inductive divider.

The arrangement provides a range of calibrated capacitance values from 0 pF to 1000 pF in 10 pF steps.

The frequency range is 50 Hz to 10 kHz and the specified capacitance accuracy is +/- 0.01 %. The dissipation factor is claimed to be 0.00002.

The Post Office connectors shown were frequently used with this type of equipment as the large contact area provided excellent repeatability of connection.

This one is in fine condition.