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{{Oscilloscope Sidebar | | {{Oscilloscope Sidebar | | ||
title=Tektronix 511| | title=Tektronix 511| | ||
summary=10 MHz Tube scope<br />''First Tektronix | summary=10 MHz Tube scope<br />''First Tektronix oscilloscope''| | ||
image=Tek 511 1.jpg| | image=Tek 511 1.jpg| | ||
caption=Tektronix 511 front | | caption=Tektronix 511 front | |