The 1311A is an oscillator from General Radio. The General Radio 1308A, Audio Oscillator & Power Amplifier, is an AC power source covering the audio range. The General Radio 1308A, Audio Oscillator & Power Amplifier, low dynamic output impedance enhances its usefulness as a power source for general testing over a wide range of supply frequencies.
- 11 fixed frequencies from 50 Hz to 10 kHz (50,60,100,120,200,400, and 500 Hz, 1,2,5, and 10 kHz)
The General Radio 1311A is normally used in audio-frequency bridge measurements and is normally included in many GR impedance-measuring systems. Power output is 1 watt into a matched load and voltage output is continuously adjustable with a maximum output of 100 V into an open circuit. Distortion is less than 0.5% under any load condition. External synchronization is also provided via 1 V reference signal. The unit ensures at least 0.5 watt into any load from 0.08 to 8000-ohms.