PG505/Repairs: Revision history

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4 October 2024

  • curprev 13:4513:45, 4 October 2024‎ Peter talk contribs‎ 830 bytes +830‎ Created page with "==Power supply== A PG505 that was described by a seller as "no variable frequency" showed an erratic output signal that partly responded to output voltage and rise/fall time controls, but was essentially at mains frequency. The source of the problem was a dry electrolytic (C555) in the floating power supply. Because the floating output stage is transformer-coupled, the output pulse was effectively triggered by the pulsed supply. The electrolytics are physically large a..."
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