Introduction
This manual provides instructions for the proper use and maintenance of your MOUDOAUER 50Hz Turntable Stroboscopic Speed Light and Tachometer Disc. This accessory is designed to assist in accurately calibrating the playback speed of your turntable for 33-1/3, 45, and 78 RPM records, ensuring optimal audio fidelity.
Package Contents
Please verify that all items listed below are present in your package:
- 1 x Strobe Light
- 1 x Tachometer Disc (50Hz)
- 1 x USB Charging Cable

Figure 1: Contents of the MOUDOAUER Turntable Stroboscopic Speed Light and Tachometer Disc package. Includes the cylindrical strobe light, the circular tachometer disc, and a USB charging cable.
Setup
- Charge the Strobe Light: Connect the provided USB cable to the strobe light and a suitable USB power source (e.g., computer USB port, wall adapter). Allow the light to charge fully before first use.
- Prepare Turntable: Ensure your turntable is powered on and operating at the desired speed (33-1/3, 45, or 78 RPM).
Operating Instructions
Follow these steps to calibrate your turntable's speed:
- Place the Tachometer Disc: Carefully place the tachometer disc directly onto your turntable's platter. Ensure it is centered and lies flat.
- Activate Strobe Light: Turn on the strobe light.
- Observe the Pattern: Hold the activated strobe light over the spinning tachometer disc. Observe the patterns corresponding to the RPM speed you are testing (33-1/3, 45, or 78 RPM).
- Adjust Turntable Speed: If your turntable has a speed adjustment control, slowly adjust it while observing the patterns on the disc.
- Achieve Static Pattern: Continue adjusting until the specific pattern for the selected RPM appears to be static, or not moving. This indicates that your turntable is operating at the correct speed.

Figure 2: The strobe light in operation, emitting a red light used to illuminate the tachometer disc.
Maintenance
- Cleaning: Use a soft, dry cloth to gently wipe the strobe light and tachometer disc. Avoid abrasive cleaners or solvents.
- Storage: Store the device in a cool, dry place away from direct sunlight and extreme temperatures when not in use.
- Battery Care: For optimal battery life, avoid fully discharging the strobe light frequently. Recharge as needed.
Troubleshooting
- Pattern is stable and does not move: This indicates the turntable speed is correct.
- Patterns on the disc move slowly clockwise: This indicates the turntable is running too fast. Adjust your turntable's speed control to decrease the RPM.
- Patterns on the disc move slowly counter-clockwise: This indicates the turntable is running too slow. Adjust your turntable's speed control to increase the RPM.
- Strobe light does not turn on: Ensure the strobe light is fully charged using the provided USB cable.
Specifications
| Item Weight | 12.3 ounces |
| Package Dimensions | 7.87 x 7.87 x 1.97 inches |
| ASIN | B0C3ZXVXBC |
| Power Source | Corded Electric (for charging) |
| Supported Frequencies | 50 Hz |
| Supported RPM Speeds | 33-1/3, 45, 78 RPM |
Warranty and Support
MOUDOAUER products are designed for reliability and performance. For warranty information or technical support, please refer to the contact details provided with your purchase or visit the official MOUDOAUER website. Please retain your proof of purchase for warranty claims.