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* [http://w140.com/tek_fcp/tek_adjust_540_vert_delay.pdf How to Adjust the Vertical Amplifier and Delay Line of a 540-Series Oscilloscope (PDF)] | * [http://w140.com/tek_fcp/tek_adjust_540_vert_delay.pdf How to Adjust the Vertical Amplifier and Delay Line of a 540-Series Oscilloscope (PDF)] | ||
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The '''Tektronix Type 543''' is an all-tube 30 MHz scope [[introduced in 1958]]. It takes | The '''Tektronix Type 543''' (rack mount '''RM43''') is an all-tube 30 MHz scope [[introduced in 1958]]. It takes | ||
[[letter-series and 1-series plug-ins]]. It is similar to a [[545]], but without the second, delayed timebase. Instead, it has a range of horizontal magnifiers from ×2 to ×100. It has the same six-stage balanced [[distributed amplifier]] (twelve [[6DK6]] tubes) as the 545. | [[letter-series and 1-series plug-ins]]. It is similar to a [[545]], but without the second, delayed timebase. Instead, it has a range of horizontal magnifiers from ×2 to ×100. It has the same six-stage balanced [[distributed amplifier]] (twelve [[6DK6]] tubes) as the 545. | ||
While the 545 has two non-calibrated X-input sensitivities, the 543 has | While the 545 has two non-calibrated X-input sensitivities, the 543 has | ||