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* [http://w140.com/Nucl_Instrum_Methods_TD_Induct_effects_1968.pdf Inductance Effects on Capacitive Loading of a Tunnel Diode] | * [http://w140.com/Nucl_Instrum_Methods_TD_Induct_effects_1968.pdf Inductance Effects on Capacitive Loading of a Tunnel Diode] | ||
* [http://w140.com/ragsdale_661_1963.pdf Self-Sampling System for Measurement of Picosecond Pulse Characteristics], R.Ragsdale, 1963 | * [http://w140.com/ragsdale_661_1963.pdf Self-Sampling System for Measurement of Picosecond Pulse Characteristics], R.Ragsdale, 1963 | ||
* [[Media:Tek 661 cal outline.pdf|Tektronix 661 Calibration Outline (PDF, OCR)]] | |||
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The '''Tektronix 661''' is a [[sampling oscilloscope]] that was [[introduced in 1961]]. | The '''Tektronix 661''' is a [[sampling oscilloscope]] that was [[introduced in 1961]]. |