517: Difference between revisions
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The voltages are different. The 517's external power supply | The voltages are different. The 517's external power supply | ||
provides +750V to the indicator unit. The highest voltage provided by | provides +750V to the indicator unit. The highest voltage provided by | ||
the 555 and 551 power supplies is +500V. Also, for example, the | the 555 and 551 power supplies is +500V. Also, for example, the 517A | ||
has +180 on pin 8 of the | has +180 on pin 8 of the 16-pin connector while the 555 and 551 have | ||
-150V on pin 8. | -150V on pin 8. | ||