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321: Difference between revisions
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title=Tektronix 321 | | title=Tektronix 321 | | ||
summary=Portable single channel scope | | summary=Portable single channel scope | | ||
image= | image=tek-321-front.jpg|321 front view | | ||
caption=Tek 321 front | | caption=Tek 321 front | | ||
introduced=1960 | | introduced=1960 | | ||
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==External Power Connector== | ==External Power Connector== | ||
Douglas W Jones | Douglas W Jones wrote: | ||
<blockquote> | <blockquote> | ||
I've got a Tektronix 321 scope | I've got a Tektronix 321 scope (serial number 001917) that I need to run from an external | ||
DC supply. The problem is, I have only the line cord, and not the | DC supply. The problem is, I have only the line cord, and not the | ||
DC cord. The power input plugs on the scope are obviously | DC cord. The power input plugs on the scope are obviously | ||
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the scope. | the scope. | ||
</blockquote> | </blockquote> | ||
<div style="padding-left: 3em;"><gallery> | |||
File:Dwj tek 321 ps connector.jpg|321 External Power Connector | File:Dwj tek 321 ps connector.jpg|321 External Power Connector | ||
File:Dwj tek 321 ps cable.jpg|Douglas W Jones' 321 External Power Cable | File:Dwj tek 321 ps cable.jpg|Douglas W Jones' 321 External Power Cable | ||
</gallery> | </gallery></div> | ||
<blockquote> | <blockquote> | ||
Added note: My bench supply has an analog Ammeter on it. | Added note: My bench supply has an analog Ammeter on it. | ||
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a steady 0.7A regardless of what you're doing with it. The | a steady 0.7A regardless of what you're doing with it. The | ||
current drain doesn't change when you vary the supply from 12 to | current drain doesn't change when you vary the supply from 12 to | ||
18V | 18V — this is because the 321 uses a linear regulator. | ||
</blockquote> | </blockquote> | ||
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<gallery> | <gallery> | ||
File:321_front.jpg|321 front view | |||
File:321_right_case.jpg|321 right case | |||
File:321_left_internal.jpg|321 left internal | |||
File:321_right_internal.jpg|321 right internal | |||
File:321_rear.jpg|321 rear view | |||
File:Tek 321 round.jpg|321 with round bezel | File:Tek 321 round.jpg|321 with round bezel | ||
File:321A_FET.JPG|Latest 321A´s frontend. | |||
</gallery> | </gallery> | ||