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* ''Manual needed, please add'' [[Category:Manual needed]] | * ''Manual needed, please add'' [[Category:Manual needed]] | ||
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The '''Tektronix 420''' is a high-voltage power supply used in the [[507|Type 507]] and [[517|Type 517]] | The '''Tektronix 420''' is a high-voltage power supply used in the [[507|Type 507]] and [[517|Type 517]] scopes. | ||
It contains transformers, rectifier tubes and filter capacitors in a separate, oil-filled enclosure with ceramic output feed-through posts. | It contains transformers, rectifier tubes and filter capacitors in a separate, oil-filled enclosure with ceramic output feed-through posts. | ||