321: Difference between revisions
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image=321_front.jpg|321 front view | | image=321_front.jpg|321 front view | | ||
caption=Tek 321 front | | caption=Tek 321 front | | ||
years= | years=1960 – ? | | ||
manuals= | manuals= | ||
*[http://elektrotanya.com/tektronix_321.pdf/download.html Tektronix 321 Manual] | *[http://elektrotanya.com/tektronix_321.pdf/download.html Tektronix 321 Manual] | ||
Revision as of 23:42, 9 August 2014
The Tektronix 321 is a very compact single-trace, single-timebase portable oscilloscope that is almost completely solid state. It was introduced on April 8th, 1960.
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. Latest 321A (SN6000 up) use a FET 151-1011-01. In several circuits, the 321 uses OC170 transistors where the 321A uses 2N2207 transistors.
Specifications
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Pictures
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321 front view
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321 right case
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321 left internal
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321 right internal
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321 rear view
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321 with round bezel
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Latest 321A´s frontend.
