1232-A

The General Radio 1232-A Tuned Amplifier and Null Detector was introduced in 1961 Catalog Q and remained available through Catalog 1978.

Specifications

• Frequency Response:

     Tunable Filters: 20 Hz to 20 kHz in 3 ranges; 5% bandwidth; 2nd harmonic at least 34 dB down from peak, 3rd at least 40 dB down.
     50 kHz and 100 kHz Filters: 2nd harmonic 44 and 53 dB down, respectively. 
     Flat Response: ±3db 20 cps to 100 kc.

• Input Impedance: Approximately 50 kΩ at maximum gain, varies inversely with gain to 1 MΩ at minimum gain.
• Gain: 120 dB on the tunable ranges; 100 dB, flat range; 106 dB at 50 kHz; 100 dB at l00 kHz position.

Links

• Experimenter describing Type 1232-A July 1961
• Experimenter describing 1232-P2 Preamplifier February 1967

Photos

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