Monthly Archives: September 2017

DECstation 5000 Model 240 PSU Failing Under Moderate Load

The H7878 PSU in my recently acquired¬†DECstation 5000 Model 240 had a shaky start and then stopped working altogether. I found a problem with the input¬†rectifier smoothing capacitors, at least one of them anyway. It was a real job to … Continue reading

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