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The Tektronix 321 is a very compact single-trace, | {{Oscilloscope Sidebar | | ||
single-timebase portable oscilloscope | title=Tektronix 321 | | ||
that is almost completely solid state. | summary=Portable single channel scope | | ||
image=321_front.jpg|321 front view | | |||
caption=Tek 321 front | | |||
years=1964 – ? | | |||
manuals= | |||
*[http://elektrotanya.com/tektronix_321.pdf/download.html Tektronix 321 Manual] | |||
*[http://bama.edebris.com/manuals/tek/321a/ Tektronix 321A manual] | |||
*[http://w140.com/tek_fcp/tek_type_321_factory_cal_proc.pdf Tektronix 321 factory calibration procedure] | |||
*Needed: 321A SN 6000 up | |||
}} | |||
The Tektronix 321 is a very compact single-trace, single-timebase portable oscilloscope that is almost completely solid state. | |||
It was [[introduced in 1960|introduced on April 8th, 1960]]. | It was [[introduced in 1960|introduced on April 8th, 1960]]. | ||
The 321 includes several germanium bipolar transistors, | |||
which are a known reliability problem. | 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. | The 321A was [[introduced in 1964]]. The 321 and 321A have slightly different circuits. | ||
Early instances of the 321 (sn pre-720) use a | Early instances of the 321 (sn pre-720) use a [[5718]] peanut tube as the front-end cathode follower. | ||
[[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]]. | 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 | In several circuits, the 321 uses [[OC170]] transistors where the 321A uses [[2N2207]] transistors. | ||
where the 321A uses [[2N2207]] transistors. | |||
==Specifications== | |||
==Pictures== | |||
<gallery> | <gallery> | ||
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Image:321A_FET.JPG|Latest 321A´s frontend. | Image:321A_FET.JPG|Latest 321A´s frontend. | ||
</gallery> | </gallery> | ||
[[Category:Portable scopes]] | |||
[[Category:CRT based solid-state scopes]] | |||
[[Category:Manual needed]] | |||
[[Category:Specifications needed]] |