121: Difference between revisions

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The frequency response is 5Hz to 12 MHz.  It has an unbalanced signal path with
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]]
switchable compensated attenuators before and after the first gain stage, a [[6CB6]]
common-cathode amplifier.
common-cathode amplifier.  The [[1121]] can be considered the successor to the 121.


* [http://bama.edebris.com/download/tek/121/tek%20121.pdf Tektronix 121 Manual (incomplete, PDF)]
* [http://bama.edebris.com/download/tek/121/tek%20121.pdf Tektronix 121 Manual (incomplete, PDF)]

Revision as of 14:11, 12 November 2011

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.