1604-B: Difference between revisions
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* [[Media:GR 1604-B Impedance Comparison Bridge 790-B 1956.pdf|General Radio 1604-B Impedance Comparison Bridge 790-B 1956]] | * [[Media:GR 1604-B Impedance Comparison Bridge 790-B 1956.pdf|General Radio 1604-B Impedance Comparison Bridge 790-B 1956]] | ||
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The '''General Radio 1604-B Comparison Bridge''' was introduced in 1954 Catalog N and remained available through Catalog O 1956. | The '''General Radio 1604-B Comparison Bridge''' was introduced in 1954 Catalog N and remained available through Catalog O 1956. The '''General Radio 1604-B Comparison Bridge''' was introduced in 1954 Catalog N and remained available through Catalog O 1956. | ||
The Type 1604-B was designed for sorting, adjusting and comparing two devices at three different frequencies. Impedance difference is measured in two ranges 5% and 20% using front panel switch, using a built generator and detector equiped with a 2AP1 CRT. A balance is achieved when the vertical deflection is at a minimum. Disipation factor difference is read directly from the dial, one range. The main change from the [[1604-A]] is the addition of the 400 Hz test frequency. | |||
==Specifications== | ==Specifications== | ||
Revision as of 09:45, 6 March 2024
The General Radio 1604-B Comparison Bridge was introduced in 1954 Catalog N and remained available through Catalog O 1956. The General Radio 1604-B Comparison Bridge was introduced in 1954 Catalog N and remained available through Catalog O 1956. The Type 1604-B was designed for sorting, adjusting and comparing two devices at three different frequencies. Impedance difference is measured in two ranges 5% and 20% using front panel switch, using a built generator and detector equiped with a 2AP1 CRT. A balance is achieved when the vertical deflection is at a minimum. Disipation factor difference is read directly from the dial, one range. The main change from the 1604-A is the addition of the 400 Hz test frequency.
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.
