543

The Tektronix Type 543 is an all-tube 30MHz 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 X2 to X100. 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 an X-input with three calibrated selectable deflection sensitivities: 0.1V/cm, 1V/cm, and 10V/cm.

543B is a hybrid and vertical delay line have no 6DK6 and LC but 186 ohms delay line.

• Tektronix 543 Manual (PDF)
• Tektronix 543 Factory Calibration Manual (PDF)
• How to Adjust the Vertical Amplifier and Delay Line of a 540-Series Oscilloscope (PDF)

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  RM543B

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  RM543B side