The 6NO45 is a 6.3 V / 500 mA, 45-second delay relay in a glass envelope with a B9A (Noval) miniature 9-pin base.

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Some instruments using part 6NO45

Instrument Manufacturer Class Model Description Introduced
581 Tektronix Oscilloscope 581 100 (95) MHz oscilloscope 1959
585 Tektronix Oscilloscope 585 100 (95) MHz oscilloscope 1959