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=Tube Scopes= | =Tube Scopes= | ||
[[Tektronix]] started producing '''[[wikipedia:Oscilloscope|oscilloscopes]]''' with the model [[511]] in [[Introduced in 1947|1947]], at which time the [[ | [[Tektronix]] started producing '''[[wikipedia:Oscilloscope|oscilloscopes]]''' with the model [[511]] in [[Introduced in 1947|1947]], at which time the [[vacuum tube]] was the primary active device, and remained so into the 1960s. <br /> | ||
While [[wikipedia:Transistor|transistors]] were used increasingly in such instruments from the mid-1950s on, this section contains instruments and instrument families primarily based on vacuum tubes (aka valves). | While [[wikipedia:Transistor|transistors]] were used increasingly in such instruments from the mid-1950s on, this section contains instruments and instrument families primarily based on vacuum tubes (aka valves). | ||