The General Radio (GR) Strobotac Type 1531-A Xenon Stroboscope, a professional laboratory-grade strobe instrument used for motion analysis, RPM observation, and industrial/mechanical diagnostics.
 
A classic piece of American test equipment known for its rugged construction, precision engineering, and powerful xenon flash system.
 
Condition
- Tested and working
- Produces strong visible flashing output
- Flash rate adjusts smoothly across the dial range
- Unit powers on properly and responds as expected
- Cosmetic condition is very good overall with normal light vintage wear consistent with age
 
Testing Notes
Unit was tested in basic operation and produces strong adjustable stroboscopic flashes. Flash rate changes appropriately with dial adjustment and responds correctly during operation.
 
When aimed at rotating objects, the unit produces visible stroboscopic motion effects consistent with proper operation. No formal calibration equipment was used.