1232-A

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

General Radio 1232-A

tuned amplifier and null detector General Radio 1232-A Tuned Amplifier and Null Detector Available from 1961 to 1978+ Manuals General Radio 1232-A Tuned Amplifier and Null Detector 1232-0100-C 08_1963 General Radio 1232-A Tuned Amplifier and Null Detector 1232-0100-00 12_1988 (All manuals in PDF format unless noted otherwise)

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.