7A26: Difference between revisions
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{{Plugin Sidebar | {{Plugin Sidebar | ||
|manufacturer=Tektronix | |||
summary=200 MHz dual channel | |series=7000-series scopes | ||
image=Tek 7a26 | |type=7A26 | ||
caption=7A26 front panel | | |summary=200 MHz dual-channel amplifier | ||
introduced=1974 | | |image=Tek 7a26 front.jpg | ||
discontinued=1991 | | |caption=7A26 front panel | ||
|introduced=1974 | |||
|discontinued=1991 | |||
* [ | |designers=Tom Rousseau | ||
* [ | |manuals= | ||
* [ | * [[Media:070-1484-00.pdf|7A26 Instruction Manual -00]] | ||
* [[Media:070-1484-01.pdf|7A26 Instruction Manual -01 Rev. Oct 1982]] (OCR) | |||
* [[Media:Tek_7A26_Anleitung_Deutsch.pdf|Tek7A26 Anleitung (Operators Manual, German)]] (OCR) | |||
* [[Media:040-0785-01.pdf|7A26 Vertical amplifier replacement]] (OCR) | |||
}} | }} | ||
The '''Tektronix 7A26''' is a 200 MHz dual-trace vertical plug-in for [[7000-series scopes]]. | |||
Designed by [[Tom Rousseau]], it was the most successful 7000 series plug-in, with over 120,000 units produced. | |||
The | The 75 MHz [[7A18]] and 400 MHz [[7A24]] share the same front panel layout and operation. | ||
{{BeginSpecs}} | {{BeginSpecs}} | ||
{{Spec | Bandwidth |200 MHz}} | {{Spec | Bandwidth |200 MHz}} | ||
{{Spec | Deflection | 5 mV/Div – 5 V/Div in 1−2−5 sequence }} | |||
{{Spec | Deflection | {{Spec | Input impedance | 1 MΩ // 22 pF }} | ||
{{Spec | Features | Bandwidth limiting switch (20 MHz) }} | {{Spec | Features | Bandwidth limiting switch (20 MHz) }} | ||
{{EndSpecs}} | {{EndSpecs}} | ||
==Links== | |||
* [https://vintagetek.org/100000-7a26-plug-in/ Tom Rousseau's Golden 100,000<sup>th</sup> 7A26] | |||
* [http://www.amplifier.cd/Test_Equipment/Tektronix/Tektronix_7000_series_amplifier/amplifier_7A26.htm Tek 7A26] @ amplifier.cd | |||
* [http://www.barrytech.com/tektronix/tek7000/tek7a26.html Tek 7A26] @ barrytech.com | |||
* [https://www.youtube.com/watch?v=7scgCL_Rl6E Tektronix 7A26 Restoration and Alignment] by Zenwizard Studios @ YouTube | |||
{{PatentLinks|7A26}} | |||
==Internals== | ==Internals== | ||
Controls layout and internal construction is very similar to the | Controls layout and internal construction is very similar to the 75 MHz [[7A18]]. | ||
Whereas the 7A18 is a discrete design, the 7A26 uses Tek-made differential amplifier ICs | Whereas the 7A18 is a discrete design, the 7A26 uses Tek-made differential amplifier ICs [[155-0078-00|155-0078-xx]]. | ||
[[155-0078-00|155-0078-xx]]. | |||
The 7A26 does not use the ±50 V supplies provided by the mainframe. | |||
==Pictures== | ==Pictures== | ||
<gallery> | <gallery> | ||
Tek 7a26 front.jpg | Front panel | |||
Tek 7a26 front_lc.jpg | Front panel | |||
Tek-7a26-left.jpg | left side | |||
Tek-7a26-right.jpg | right side | |||
7a26-cowboy.png | [[Tektronix Cartoons|Cartoon]] in schematic: [http://www.reprise.com/host/tektronix/humor/cowboy.asp The 7A26 Sharp Shooter] | |||
</gallery> | </gallery> | ||
==Components== | |||
{{Parts|7A26}} | |||
[[Category:7000 series vertical plugins]] | [[Category:7000 series vertical plugins]] | ||
Latest revision as of 04:51, 19 June 2024
The Tektronix 7A26 is a 200 MHz dual-trace vertical plug-in for 7000-series scopes. Designed by Tom Rousseau, it was the most successful 7000 series plug-in, with over 120,000 units produced.
The 75 MHz 7A18 and 400 MHz 7A24 share the same front panel layout and operation.
Key Specifications
Bandwidth | 200 MHz |
---|---|
Deflection | 5 mV/Div – 5 V/Div in 1−2−5 sequence |
Input impedance | 1 MΩ // 22 pF |
Features | Bandwidth limiting switch (20 MHz) |
Links
- Tom Rousseau's Golden 100,000th 7A26
- Tek 7A26 @ amplifier.cd
- Tek 7A26 @ barrytech.com
- Tektronix 7A26 Restoration and Alignment by Zenwizard Studios @ YouTube
Patents that may apply to 7A26
Page | Title | Inventors | Filing date | Grant date | Links |
---|---|---|---|---|---|
Patent US 3562464A | Cam actuated switch having movable and fixed contacts on circuit board | Howard Vollum • Willem H Verhoef • Tony Sprando | 1968-10-07 | 1971-02-09 | Cam switches • 2701 • 2703 • 432 • 434 • 465 • 475 • 5A38 • 5A45 • 7A15 • 7A16A • 7A18 • 7A19 • 7A24 • 7A26 • 7B10 • 7B15 • 7B50 • 7B51 • 7B52 • 7B53A • 7B50A • 7B70 • 7B71 • 7B80 • 7B85 • 7B87 • 7B92 • 7B92A • 7D01 • 7D12 • 7D15 • 7J20 • 7S12 • 7T11 • 7T11A • AM503 |
Patent US 3719788A | Switch having ganged contacts mounted on opposite sides of circuit board | Ken Holland • Tony Sprando | 1971-02-04 | 1973-03-06 | 465 • 475 • 5A38 • 5A45 • 7A15 • 7A16A • 7A18 • 7A19 • 7A24 • 7A26 • 7D15 |
Patent US 3753170A | Step attenuator apparatus having attenuator stages selectively connected in cascade by cam actuated switches | Ken Holland | 1971-02-10 | 1973-08-14 | 465 • 475 • 5A38 • 5A45 • 7A15 • 7A16A • 7A18 • 7A19 • 7A24 • 7A26 |
Patent US 3900711A | Electrical contactor assembly for high frequency applications | Ken Holland | 1974-02-04 | 1975-08-19 | 465 • 475 • 5A38 • 5A45 • 7A15 • 7A16A • 7A18 • 7A19 • 7A24 • 7A26 • 7D15 • AM503 |
Internals
Controls layout and internal construction is very similar to the 75 MHz 7A18. Whereas the 7A18 is a discrete design, the 7A26 uses Tek-made differential amplifier ICs 155-0078-xx.
The 7A26 does not use the ±50 V supplies provided by the mainframe.
Pictures
-
Front panel
-
Front panel
-
left side
-
right side
-
Cartoon in schematic: The 7A26 Sharp Shooter
Components
Some Parts Used in the 7A26
Part | Part Number(s) | Class | Description | Used in |
---|---|---|---|---|
151-1032-00 | 151-1032-00 | Discrete component | dual n-channel JFET (selected) | 7A15A • 7A26 |
155-0078-00 | 155-0078-xx • 155-0273-00 • 155-0274-00 | Monolithic integrated circuit | broadband amplifier | 464 • 465 • 466 • 468 • 475 • 475A • 475M • 485 • 7834 • 7844 • 7854 • 7904 • R7903 • R7912 • 7912AD • 7912HB • 7104 • 7A16A • 7A16P • 7A24 • 7A26 • 7A42 • 067-0587-01 • 067-0680-00 • AM503 • PG502 • PG508 • DC510 • DC5010 • FG5010 |
307-1012-00 | 307-1012-00 | Discrete component | thick-film 5x attenuator | 7A26 |