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