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The Tektronix 321 is a very compact single-trace, single-timebase portable oscilloscope that is almost completely solid state. The 321 includes several germanium bipolar transistors, which are a known reliability problem. The 321 and 321A have slightly different circuits. Early instances of the 321 | The Tektronix 321 is a very compact single-trace, | ||
(sn pre-720) use a 5718 peanut tube as the front-end cathode follower. Later 321 and 321A | single-timebase portable oscilloscope | ||
use a 7586 nuvistor for that role. In several circuits, the 321 uses OC170 transistors where | that is almost completely solid state. | ||
the 321A uses 2N2207 transistors. | The 321 includes several germanium bipolar transistors, | ||
which are a known reliability problem. | |||
The 321A was [[introduced in 1964]]. | |||
The 321 and 321A have slightly different circuits. | |||
Early instances of the 321 (sn pre-720) use a | |||
[[5718]] peanut tube as the front-end cathode follower. | |||
Later 321 and 321A use a [[7586]] nuvistor for that role. | |||
In several circuits, the 321 uses [[OC170]] transistors | |||
where the 321A uses [[2N2207]] transistors. | |||
[http://bama.edebris.com/manuals/tek/321a/ Tektronix 321A manual] | [http://bama.edebris.com/manuals/tek/321a/ Tektronix 321A manual] | ||
Revision as of 10:31, 31 December 2011
The Tektronix 321 is a very compact single-trace, single-timebase portable oscilloscope that is almost completely solid state. The 321 includes several germanium bipolar transistors, which are a known reliability problem. The 321A was introduced in 1964. The 321 and 321A have slightly different circuits. Early instances of the 321 (sn pre-720) use a 5718 peanut tube as the front-end cathode follower. Later 321 and 321A use a 7586 nuvistor for that role. In several circuits, the 321 uses OC170 transistors where the 321A uses 2N2207 transistors.
Tektronix 321 factory calibration procedure
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front view
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right case
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left internal
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right internal
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rear view
