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{{Plugin Sidebar | {{Plugin Sidebar | ||
|manufacturer=Tektronix | |||
summary=85 MHz | |series=580-series scopes | ||
image= | |type=82 | ||
caption=Type 82 front view ( | |summary=85 MHz dual-trace amplifier | ||
introduced=1962 | | |image=Tek_82_early_front.jpg | ||
discontinued= | |caption=Type 82 front view (earlier style) | ||
|introduced=1962 | |||
manuals= | |discontinued=1972 | ||
* [ | |designers=John Gates; | ||
|manuals= | |||
* [[Media:070-349.pdf|Tektronix Type 82 Manual]] | |||
}} | }} | ||
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 (85 MHz bandwidth). | ||
{{BeginSpecs}} | {{BeginSpecs}} | ||
{{Spec | Rise time | 4 ns (in [[585]] mainframe), | {{Spec | Rise time | 4 ns in ×1 mode, 4.3 ns in ×10 mode (in [[585]] mainframe) }} | ||
{{Spec | Deflection | | {{Spec | Bandwidth | 85 MHz in ×1 mode, 80 MHz in ×10 mode (in [[585]] mainframe); 70 MHz/66 MHz, respectively, with [[P6008]] probe }} | ||
{{Spec | Deflection | 50 V/Div to 100 mV/Div in ×1 mode, 5 V/Div to 10 mV/Div in ×10 mode (1-2-5) }} | |||
{{EndSpecs}} | {{EndSpecs}} | ||
==Internals== | ==Internals== | ||
The front end of the Type 82 | The front end of the Type 82 has three versions, depending on serial number range. | ||
followed by bipolar diff-amps and diode channel switching, | In all versions, the signal path starts with a [[7586]] [[nuvistor]] cathode-follower, followed by bipolar diff-amps | ||
followed by a [[distributed amplifier|distributed output amplifier]] made of three [[6DJ8]] tubes, | and diode channel switching, followed by a [[distributed amplifier|distributed output amplifier]] made | ||
with differential | of three [[6DJ8]] tubes, with differential 93 Ω outputs. | ||
The use of a distributed amplifier in a plug-in is unusual. | The use of a distributed amplifier in a plug-in is unusual. | ||
Note that the 58x series differs from [[500-series scopes]] mainly in that | Note that the 58x series differs from [[500-series scopes]] mainly in that the vertical | ||
the vertical signal interface between the plug-in and the mainframe is | signal [[580 Series plug-in interface|interface between the plug-in and the mainframe]] | ||
a low controlled impedance (93 ohms), as opposed to other 500-series scopes | is a low controlled impedance (93 ohms), as opposed to other 500-series scopes | ||
that present a high impedance to the plug-in. | that present a high impedance to the plug-in. | ||
| Line 39: | Line 41: | ||
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 | positions were lousy. 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 | ||
high frequency signals on the less sensitive ranges, the answer is to | high frequency signals on the less sensitive ranges, the answer is to get ×100 | ||
probes and use them on the more sensitive ranges where the frequency response is | probes and use them on the more sensitive ranges where the frequency response is | ||
better. | better. | ||
| Line 48: | Line 50: | ||
The [[P6008]] voltage probe was designed for use with the Type 82. | The [[P6008]] voltage probe was designed for use with the Type 82. | ||
The [[585]] manual warns that for proper performance with the 82 and higher-numbered plug-ins, 585 non-A scopes with serial numbers before 2585 should have the back termination of the final distributed amplifier output modified to the later circuit (modification 040-275). | |||
==Prices== | |||
{| class="wikitable" | |||
|- | |||
! Year | |||
! 1965 | |||
! 1969 | |||
! 1971* | |||
! 1972* | |||
|- | |||
! Type 82 | |||
|align=right| $650 | |||
|align=right| $695 | |||
|align=right| $925 | |||
|align=right| $1,000 | |||
|- | |||
! In 2023 Dollars | |||
|align=right| $6,300 | |||
|align=right| $5,800 | |||
|align=right| $6,900 | |||
|align=right| $7,400 | |||
|} | |||
: ''* "Limited demand" instrument | |||
==Pictures== | ==Pictures== | ||
<gallery> | <gallery> | ||
Tek_82_early_front.jpg | Front view, early style | |||
Tek 82 1d.JPG | Front view, later style | |||
Tek-585-82.jpg | Early type 82 in [[585]] mainframe | |||
Tek-82-left.jpg | Left side | |||
Tek-82-right.jpg | Right side | |||
Tek82-input-1.jpg | Detail of input section | |||
Tek82-input-2.jpg | Detail of input section | |||
82_front.jpg | Front view, early style | |||
82_left.jpg | Left view | |||
82_top.jpg | Top view | |||
82_right.jpg | Right view | |||
Type 82 top.jpg | |||
Type 82 rear.jpg | |||
Type 82 leftb.jpg | |||
Type 82 bottom.jpg | |||
Type 82 distamp bottom.jpg | Bottom of distributed amplifier | |||
Type 82 distamp top.jpg | Top of distributed amplifier | |||
Type 82 front.jpg | |||
Tek 82 late input schematic.png|Input schematic for late serial numbers | |||
Tek 82 x10 amplifiers schematic.png|x10 amplifiers schematic | |||
Tek 82 switching and output schematic.png|Switching and output schematic | |||
</gallery> | </gallery> | ||
==Components== | |||
{{Parts|82}} | |||
[[Category:580 series plugins]] | [[Category:580 series plugins]] | ||