GR General Radio 1232A Tuned Amplifier Null Detector 1232-A, with BNC adapter
Specifications
| Return Shipping Will Be Paid By | Buyer |
| All Returns Accepted | Returns Accepted |
| Item Must Be Returned Within | 14 Days |
| Refund Will Be Given As | Money Back |
| Brand | General Radio |
| Frequency Range | 100 kHz |
| MPN | 1232-A |
| Country/Region Of Manufacture | United States |
GR General Radio 1232A Tuned Amplifier Null Detector 1232-A, with BNC adapter The Type 1232-A Tuned Amplifier and Null Detector is a battery operated, sensitive, low-noise amplifier continuously tunable from 20 Hz to 20 kHz, with additional fixed-tuned frequencies of 50 kHz and 100 kHz. It is intended primarily as a bridge detector but can also be used as a sensitive voltmeter to detect low level signals in the presence of noise. Frequency Response: TUNABLE FlLTERS: 20 Hz to 20 kHz in 3 ranges; between 2% and 6% bandwidth to 15 kHz; 2nd harmonic at least 34 dB down from peak, 3rd at least 40 dB down; rejection filter on two highest ranges reduces 60-Hz level to at least 60 dB below peak response (50-Hz level is down >50 dB). Dial accuracy is ±3%.FlXED-TUNED FlLTERS: 50 kHz, 2nd harmonic is 44 dB down; 100 kHz ... 53 dB down. FLAT RESPONSE: ±3 dB from 20 Hz to 100 kHz.Sensitivity: Typically better than 0.1 μV over most of the frequency range. Noise Level: REFERRED TO INPUT: Noise figure at 1 kHz is less than 2 dB at an optimum source impedance of 27 kΩREFERRED TO OUTPUT: Less than 5 mV on FLAT filter-frequency position, min gain setting, and -20dB switch position; less than 50 mV in MAX SENS position.Input: IMPEDANCE: Approx 50 kΩ at max gain; varies inversely with gain to 1 MΩ at min gain.MAX SAFE VOLTAGE: 200 V ac or 400 V dc.Output: VOLTAGE GAIN: Approx 120 dB on the tunable ranges: 100 dB, flat range; 106 dB at 50 kHz; 100 dB at 100-kHz position.LEVEL: 1 V into 10 kΩ when meter indication is full scale. INTERNAL IMPEDANCE: 3 kΩ.METER LINEARITY: dB differences are accurate to ±5% ±0.1 division for inputs of less than 0.3 V. COMPRESSION (meter switch to LOG): Reduces full scale sensitivity by 40 dB. Does not affect bottom 20% of scale. ATTENUATION (meter switched to -20 dB): Linear response with 20dB less gain than MAX SENS.Distortion (filter switch in FLAT position): <5% (due to meter rectifiers). Terminals: Input, GR874® coaxial connector; output, binding posts. The item is in good condition, tested and working. The 1232-A includes a retrofit battery and a GR874 to BNC(f) adapter.
Related Items
