123: Difference between revisions

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The Tektronix 123 is a miniature preamplifier [[introduced in 1958]].   
The Tektronix 123 is a miniature preamplifier [[introduced in 1955]].   
The gain is 100, input impedance is 10 megohms, and output impedance is
The gain is 100, input impedance is 10 megohms, and output impedance is
31 kilohms.  The frequency response is from 3 Hz to 25 kHz.
31 kilohms.  The frequency response is from 3 Hz to 25 kHz.