General Radio String Oscillograph Model Type 338

Manufacturer: General Radio

Model Number: Type 338

Serial #: 362

Equipment Description: String Oscillograph

Label Write-up:
This 1928 forerunner to the oscilloscope has a wire carrying the observed current. It is fixed in a strong magnetic field. The wire will move proportionally to the current going through it. The beam of a strong lamp is focused on the center of the wire and the wire’s shadow will fall on a rotating mirror and on a viewing screen.

Dates Produced: 1928

Original Price: $225

The museum's inventory number: MRT-1194

Located at Museum in: Test Equipment Room