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1121: Difference between revisions
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which gives a transconductance of about 13mS. Assuming the tube operates unilaterally, | which gives a transconductance of about 13mS. Assuming the tube operates unilaterally, | ||
this gives an impedance of about 77 ohms at the cathode of V483. Series output resistor | this gives an impedance of about 77 ohms at the cathode of V483. Series output resistor | ||
R486, 30 ohms, makes the output resistance of the 1121 about 107 ohms. | R486, 30 ohms, makes the output resistance of the 1121 about 107 ohms. (Why is this not | ||
93 ohms?) | |||
The 1121 uses a [[turret attenuators|turret attenuator]] at the input. | |||
* [http://bama.edebris.com/download/tek/1121/Tek%201121.pdf Tektronix 1121 Manual (PDF)] | * [http://bama.edebris.com/download/tek/1121/Tek%201121.pdf Tektronix 1121 Manual (PDF)] | ||