General Radio Null Detector Model Type 707-A

Manufacturer: General Radio

Model Number: Type 707-A

Serial #: 181

Equipment Description: Null Detector

Label Write-up:
Cathode Ray Null Detector. This is a basic oscilloscope used for balancing an impedance bridge. It indicates, separately, the effect of adjusting the reactive and resistive balancing controls of the bridge. The display is visual. Frequencies between 25 cycles and 20 kilocycles. Rack mounted.

Dates Produced: 1942

Original Price: $195

The museum's inventory number: MRT-1202

Located at Museum in: Test Equipment Room