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7503: Difference between revisions
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Like other 75xx and 76xx mainframes and the 7504, the 7503 has a linear power supply, as opposed to the switchmode supplies used in the later 4-slot mainframes. In addition to the +5 V, ±15 V, ±50 V rails common to the 7000 series, internally (not on the plug-in slots) it has a +75 V output not found in later models, and a +150 V instead of the later +130 V. | Like other 75xx and 76xx mainframes and the 7504, the 7503 has a linear power supply, as opposed to the switchmode supplies used in the later 4-slot mainframes. In addition to the +5 V, ±15 V, ±50 V rails common to the 7000 series, internally (not on the plug-in slots) it has a +75 V output not found in later models, and a +150 V instead of the later +130 V. | ||
The 7503 contains a mercury-based [[elapsed time meter]] on the rear of the main interface board. | |||
==Pictures== | ==Pictures== | ||