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585: Difference between revisions
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12.6 V supply reference info
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A transistor-based regulator supplies a +12.6 V heater voltage to the plug-in. | A transistor-based regulator supplies a +12.6 V heater voltage to the plug-in. | ||
A [[delay relay| | A [[delay relay|6NO45 delay relay]] controls a multi-contact relay to switch supply voltages on only after the tubes are warmed up. | ||
When the main relay engages, the delay relay is cut out so it will be ready to delay again even after a quick interrupt in power input. | When the main relay engages, the delay relay is cut out so it will be ready to delay again even after a quick interrupt in power input. | ||
12.6 V power supply regulation is referenced from +100V regulated output. Since +100V is not available during the warm-up period, an unregulated +100 V (~+180 V) is fed as the reference to 12.6 V power supply during warmup period. This is cut out by the multi-contact relay post warmup. | |||
The 585 contains a 53°C (128°F) [[thermal cutoff]]. | The 585 contains a 53°C (128°F) [[thermal cutoff]]. | ||