Atari 520ST PSU Tester
Atari 520ST power supply unit (PSU) automated tester. Forces a constant current from the power supply and measures voltage levels and ripple. Results are displayed in real time on a digital OLED display. The tester features an aluminum heat sink to perform long-term tests. Round DIN7 plug matching the original Atari 520ST/260ST PSU pinout.
Power supply tester for Atari 520ST
Forces a constant current from the 5V, 12V, and -12V DC PSU outputs
Measures voltages, currents, and ripple
Results displayed in real-time on digital OLED display
Heat sink for dissipating power during long-term tests
Plug and play easy usage, no setup required
Round DIN7 plug with 5V DC, 12V DC, and -12V DC
Check it before it's too late
Power supply failures are among the most common problems among retro Atari 520ST and 260ST systems. An Atari 520ST PSU failure can lead to expensive repairs, or even render the entire system useless. This is specifically why we have designed the Atari 520ST power supply tester. It runs a thorough test, minimizing the risk of damage due to an ageing factory power supply.
Voltage, current, ripple
The Atari 520ST tester measures the primary +5V DC output voltage and ripple at a constant current of roughly 400mA...500mA. Secondary voltages (+12V DC, -12V DC) are measured at a lower current, typically 50...150mA. Measurement results are updated on a digital OLED display in real-time, allowing a live evaluation of the power quality.
Long-term testing
The power supply tester has an aluminum heat-sink allowing to dissipate excessive power and perform long-term testing. It's designed to work both as a quick diagnostic tool, and for long-term stability tests.
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