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The '''Tektronix Type 82''' is a dual-trace plug-in for the [[580-series scopes]]. | The '''Tektronix Type 82''' is a dual-trace plug-in for the [[580-series scopes]]. | ||
The Type 82 combined with a [[585]] or 585A provides a 4 nanosecond risetime. | The Type 82 combined with a [[585]] or 585A provides a 4 nanosecond risetime. | ||
{{BeginSpecs}} | |||
{{Spec | Rise time | 4 ns (in [[585]] mainframe), i.e. 85 MHz bandwidth }} | |||
{{Spec | Deflection | 10 mV/Div to 50 V/Div, 1-2-5 }} | |||
{{EndSpecs}} | |||
==Internals== | |||
The front end of the Type 82 is a [[7586]] [[nuvistor]] cathode-follower, | The front end of the Type 82 is a [[7586]] [[nuvistor]] cathode-follower, | ||
followed by bipolar diff-amps and diode channel switching, | followed by bipolar diff-amps and diode channel switching, | ||
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If you feed [a fast risetime] signal into an early type 82, you will | If you feed [a fast risetime] signal into an early type 82, you will | ||
find that the top three least sensitive positions have really terrible frequency | find that the top three least sensitive positions have really terrible frequency | ||
response . . . so bad, in fact, that some customers thought they were broken. | response ... so bad, in fact, that some customers thought they were broken. | ||
When told this was normal, these customers wondered why Tek ever included them | When told this was normal, these customers wondered why Tek ever included them | ||
on the plugin. The answer was that they were still useful for low frequency | on the plugin. The answer was that they were still useful for low frequency | ||
signals . . . but Tek never really made it well known that these 82 attenuator | signals ... but Tek never really made it well known that these 82 attenuator | ||
positions were lousey. I think this was fixed on the later 82's as Tek learned | positions were lousey. I think this was fixed on the later 82's as Tek learned | ||
how to make better attenuators. If you have an early 82 and need to look at | how to make better attenuators. If you have an early 82 and need to look at | ||
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The [[P6008]] voltage probe was designed for use with the Type 82. | The [[P6008]] voltage probe was designed for use with the Type 82. | ||
==Pictures== | ==Pictures== | ||
<gallery> | <gallery> | ||
File:82_front.jpg|Front view, early style | |||
File:82_left.jpg|Left view. | |||
File:82_top.jpg|Top view. | |||
File:82_right.jpg|Right view | |||
File:Type 82 top.jpg | |||
File:Type 82 rear.jpg | |||
File:Type 82 leftb.jpg | |||
File:Type 82 bottom.jpg | |||
File:Type 82 distamp bottom.jpg|Bottom of distributed amplifier | |||
File:Type 82 distamp top.jpg|Top of distributed amplifier | |||
File:Tek 82 1d.JPG|Front view, later style | File:Tek 82 1d.JPG|Front view, later style | ||
</gallery> | </gallery> | ||
[[Category:580 series plugins]] | [[Category:580 series plugins]] |