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121: Difference between revisions
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The Tektronix 121 is a wideband preamplifier intended for [[511]] scopes. | The '''Tektronix 121''' is a wideband preamplifier intended for [[511]] scopes. | ||
The voltage gain is 100, input impedance is | The voltage gain is 100, input impedance is 1 MΩ in parallel with 25 pF. | ||
The frequency response is | The frequency response is 5 Hz to 12 MHz. It has an unbalanced signal path with switchable compensated attenuators before and after the first gain stage, a [[6CB6]] common-cathode amplifier. The [[1121]] can be considered the successor to the 121. | ||
switchable compensated attenuators before and after the first gain stage, a [[6CB6]] | |||
common-cathode amplifier. The [[1121]] can be considered the successor to the 121. | |||
* [http://w140.com/tek_121_complete.pdf Tektronix 121 Manual (PDF)] | * [http://w140.com/tek_121_complete.pdf Tektronix 121 Manual (PDF)] | ||