3B1: Difference between revisions

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and forth between its two stable voltages, which are capacitively coupled to a
and forth between its two stable voltages, which are capacitively coupled to a
[[2N2501]] NPN common emitter amplifier.  
[[2N2501]] NPN common emitter amplifier.  
The delayed trigger circuit is a [[6DJ8]] differential amplifier that
compares the sweep ramp voltage with a knob-controlled
DC voltage which determines the point where the delayed trigger starts. 
The DC voltage is made by a [[ZZ1000]] 80V reference passed through
a potentiometer-variable voltage divider. 
When the sweep ramp exceeds the control voltage, a tunnel diode in the
plate load of the differential amplifier switches state.


* [http://w140.com/tek_3b1.pdf Tektronix 3B1 Manual (PDF)]
* [http://w140.com/tek_3b1.pdf Tektronix 3B1 Manual (PDF)]

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