1521-B

The General Radio 1521-B Graphic Level Recorder was introduced in Catalog S (1965) and remained available through Catalog 1978.

The Type

Specifications

• Recording Range: 40 dB full scale with standard potemtiometer
• Frequency Range: 7 Hz to 200 kHz
• Maximum Input Voltage: 100 V ac
• Input Attenuator: 60 dB in 10-dB steps
• Input Impedance: 10,000 Ω for ac level recording; 1000 Ω for dc

Links

• Experimenter June 1959 describing Type 1521-A

Photos

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