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* Pin 7: -250V, regulated | * Pin 7: -250V, regulated | ||
* Pin 8: +180V, unregulated | * Pin 8: +180V, unregulated | ||
Later 517A units uses the same cable as the [[551]] and [[555]]. | |||
The 517 makes extensive use of the [[distributed amplifier]] concept. | The 517 makes extensive use of the [[distributed amplifier]] concept. |