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The Tektronix 517 is a 50MHz scope. The power supply is an external box, similar to the 551 and 555. | The Tektronix 517 is a 50MHz scope introduced in 1951 or 1952. The power supply is an external box, similar to the 551 and 555. | ||
The 517 does not take plug-ins. There is also a 517A. | The 517 does not take plug-ins. There is also a 517A. | ||