121: Difference between revisions
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common-cathode amplifier. The [[1121]] can be considered the successor to the 121. | common-cathode amplifier. The [[1121]] can be considered the successor to the 121. | ||
* [http:// | * [http://w140.com/tek_121_complete.pdf Tektronix 121 Manual (PDF)] | ||
<gallery> | <gallery> | ||
Image:Tek 121 front.jpg | Image:Tek 121 front.jpg | ||
Revision as of 13:18, 21 January 2012
The Tektronix 121 is a wideband preamplifier intended for 511 scopes. The voltage gain is 100, input impedance is 1 megohm in parallel with 25pF. The frequency response is 5Hz 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.
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Block diagram
