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m (→top: clean up, replaced: {{Oscilloscope Sidebar → {{Oscilloscope Sidebar |manufacturer=Tektronix |designers=, title=Tektronix → model=) |
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{{Oscilloscope Sidebar | | {{Oscilloscope Sidebar |manufacturer=Tektronix |designers= | | ||
model= 503 | | |||
summary=450 kHz differential-input scope | | summary=450 kHz differential-input scope | | ||
image=Tek 503 corner.jpg | | image=Tek 503 corner.jpg | |