My Mega ST 4 "High" machine runs on a modern replacement power supply, the STPSU from CenturionTech. I went for this because the original PSU is aging, and a modern supply delivers far more stable power, which matters especially with the ET4000 graphics card drawing from the 5V and 12V rails.
+ +Why a new power supply
+The original Atari PSUs are decades old now, and their output rails can drift, ripple or sag under load. A highly upgraded machine like the "High" with its MonSTerBoard, IDE storage and ET4000 card draws more current than a stock ST, and a clean, stable supply avoids the crashes and instability that can come from a worn-out PSU. The STPSU is a drop-in replacement designed specifically for the Atari 520/1040 STF/STFM/E and Mega ST machines.
+ +STPSU features
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- True plug-and-play, a complete drop-in replacement, no modification to the computer needed. +
- 230V and 110V AC, works on both power networks. +
- Efficient switched-mode design, very low heat dissipation. +
- High current output, supports heavily upgraded and modified configurations. +
- Stable, low-noise output, in all working conditions. +
- Zero noise design, no heatsink or fan needed. +
- Extra on-board output connector, to power additional devices. +
- On-board LED indicators, for operational status. +
- Safety features, thermal shutdown, short-circuit and over-current protection. +
My Setup
+In the Mega ST 4 "High" machine the STPSU provides clean, stable power to the MonSTerBoard, IDE storage, the ET4000 and the rest of the workstation, keeping everything running reliably.
+ +Gallery
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+The STPSU replacement power supply from CenturionTech.
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+The STPSU board detail.
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+The STPSU ready for installation.
+ +Manual and documentation
+CenturionTech provide a user manual PDF. Since such documents can disappear from the web, I've also kept a local copy of the manual (version 1.01) in this project:
+Download the STPSU User Manual (1.01) here
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