661: Difference between revisions

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101 bytes added ,  9 March 2017
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* [http://w140.com/tek_661_factory_cal_proc.pdf Tektronix 661 Factory Calibration Procedure (PDF)]
* [http://w140.com/tek_661_factory_cal_proc.pdf Tektronix 661 Factory Calibration Procedure (PDF)]
* [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
* [http://w140.com/ragsdale_661_1963.pdf Self-Sampling System for Measurement of Picosecond Pulse Characteristics], R.Ragsdale, 1963
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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]].   
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Some 661s have a 41 pin [[Bendix connector]] on the rear panel, perhaps to allow the 661 to be interfaced to low speed data acquisition equipment or a computer.  This is essentially a pass-through from J2 & J3, the secondary multi-pin connectors on the vertical & horizontal plug-ins.  These connectors carry switch position information (number, magnitude & units) and clock & gate pulses. Not all plug-ins had this 2nd connector; the [[5T1A]] does, while the [[5T3]] does not.   
Some 661s have a 41 pin [[Bendix connector]] on the rear panel, perhaps to allow the 661 to be interfaced to low speed data acquisition equipment or a computer.  This is essentially a pass-through from J2 & J3, the secondary multi-pin connectors on the vertical & horizontal plug-ins.  These connectors carry switch position information (number, magnitude & units) and clock & gate pulses. Not all plug-ins had this 2nd connector; the [[5T1A]] does, while the [[5T3]] does not.   


The 661 has a 137°F [[thermal cutoff]].  In practice, it doesn't run hot.
The 661 has a 137°F/58 °C [[thermal cutoff]].  In practice, it doesn't run hot.


The Tektronix [[012-064]] is a plug-in extension cable for the 661.
The Tektronix [[012-064]] is a plug-in extension cable for the 661.

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