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The '''Tektronix Type 127''' "Preamplifier Power Supply", [[introduced in 1958]], | The '''Tektronix Type 127''' "Preamplifier Power Supply", [[introduced in 1958]] and made until 1971, is a power supply, calibrator, and unity-gain preamplifier for two | ||
is a power supply, calibrator, and unity-gain preamplifier for two | |||
[[letter-series and 1-series plug-ins|letter-series or 1-series plug-ins]]. | [[letter-series and 1-series plug-ins|letter-series or 1-series plug-ins]]. | ||