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The '''Tektronix Type 555''', nicknamed "Triple Nickel", is a [[dual-beam scopes|dual-beam CRT oscilloscope]] introduced by Tektronix in | The '''Tektronix Type 555''', nicknamed "Triple Nickel", is a [[dual-beam scopes|dual-beam CRT oscilloscope]] introduced by Tektronix in | ||
[[introduced_in_1959|1959]] and made until the late 1960's, when it was | [[introduced_in_1959|1959]] and made until the late 1960's, when it was replaced by the [[556]]. | ||
The system is split across two cabinets, the main indicator unit and the external power supply unit. | The system is split across two cabinets, the main indicator unit and the external power supply unit. |