1604-B

General Radio 1604-B

comparison bridge General Radio 1604-B Comparison Bridge Available from 1954 to 1956 Manuals General Radio 1604-B Impedance Comparison Bridge 790-B 1956 (All manuals in PDF format unless noted otherwise)

The General Radio 1604-B Comparison Bridge was introduced in 1954 Catalog N and remained available through Catalog O 1956.

Specifications

Deviation Range: Impedance difference, ±5% and ±20%, switched. Disipation factor difference, ±.006 at 400 Hz. ±.015 at 1 kHz. ±.075 at 5 kHz.
Test Frequency: 400 Hz, 1 kHz, and 5 kHz; The frequency is within ±3% of the nominal value.
Voltage Applied to Unknown: Approximately one volt, for impedances above 500 Ω. For lower values of impedance the voltage is decreased.