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521: Difference between revisions
1970 catalog: listed in new products
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{{Instrument Sidebar | {{Instrument Sidebar | ||
|manufacturer=Tektronix | |manufacturer=Tektronix | ||
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|image=Tek_521A_Front.jpeg | |image=Tek_521A_Front.jpeg | ||
|caption=Tektronix 521 | |caption=Tektronix 521 | ||
|introduced= | |introduced=1970 | ||
|discontinued=(?) | |discontinued=(?) | ||
|designers= | |designers= | ||