General Radio Corp 1390-B Random Noise Generator
General Radio Corp 1390-B Random Noise Generator - Tested and functional. Comes with Manual and this unit is in excellent working and physical condition. Please see photos.
Cash Sale No Holds Call or Text for Pick-up
Brief summary of operation and uses:
The 1390-B random noise generator provides high levels of electrical noise over three selectable ranges, 20 kHz, 500 kHz and 5 MHz. The generator uses as noise source tube, type 6D4, operating in a transverse magnetic field.
The device has many uses including:
- Room Acoustic Measurements
- Loudspeaker and microphone testing
- Filter Testing
- Cross talk measurements
- multichannel carrier systems
- Psychoacoustics tests
- Recording systems testing
- Modulation of signal generators /Test Oscillators
- RMS response of meters
- observation in resonance
The 1390B Random-Noise Generator generates a broad band noise signal (5Hz to 5MHz) with a uniform spectrum level, especially useful in noise and vibration testing of mechanical and electrical systems. Upper frequency cutoff can be set at 20kHz, 500kHz, or 5MHz. Output level is controlled by a 4-step attenuator with 20 dB steps and a continuously variable control providing a calibrated, metered output from
Tube Compliment: 6D4, 6AG5, 6AG5