650-P1
The General Radio 650-P1 Oscillator-Amplifier was introduced in Catalog L (1948) and remained available through Catalog O (1956).
The Type 650-P1 is an accessory oscillator and amplifier for the Type 650-A Impedance Bridge. Its designed to fit into the empty battery compartment of the bridge. It provides a DC potential and 1 kHz generator for bridge measurements. A built-in amplifier is available for AC detector use. Amplifier gain is variable and a choice of tuned 1 kHz or flat frequency response. The 1 kHz generator output has a variable control.
- Caution: The DC output terminals have at least 185 V available and are uninsulated!
Specifications
- Oscillator
- Frequency: 1 kHz ±1%
- Harmonics: less than 4% at full output
- Open-Circuit Voltage: 10 to 15 V
- Internal Impedance: 2000 Ω
- Amplifier:
- Voltage Gain: 45 dB
- Selectivity: approximately 15 dB attenuation to second harmonic when tuned to 1 kHz
- DC Output:
- Open circuit voltage: 185 V, approximately
- Internal Resistance: 23 kΩ
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