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The Tektronix 7A26 is a | {{Plugin Sidebar | ||
[[7000-series scopes]]. | |manufacturer=Tektronix | ||
|series=7000-series scopes | |||
|type=7A26 | |||
|summary=200 MHz dual-channel amplifier | |||
|image=Tek 7a26 front.jpg | |||
|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. | |||
* [http:// | The 75 MHz [[7A18]] and 400 MHz [[7A24]] share the same front panel layout and operation. | ||
* [http:// | |||
{{BeginSpecs}} | |||
{{Spec | Bandwidth |200 MHz}} | |||
{{Spec | Deflection | 5 mV/Div – 5 V/Div in 1−2−5 sequence }} | |||
{{Spec | Input impedance | 1 MΩ // 22 pF }} | |||
{{Spec | Features | Bandwidth limiting switch (20 MHz) }} | |||
{{EndSpecs}} | |||
==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 [[155-0078-00|155-0078-xx]]. | |||
The 7A26 does not use the ±50 V supplies provided by the mainframe. | |||
==Repair issues== | |||
The pins of the attenuator modules are connected to conductive traces on the ceramic substrate inside by low-temperature soldering, which can go bad. | |||
Re-seating the module can temporarily restore the internal contact but will usually not fix the problem permanently. | |||
Repair is possible by opening the click-locked lid and carefully re-soldering (see [[307-1012-00]]). | |||
==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 | |||
==Pictures== | |||
<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> | |||
==Components== | |||
{{Parts|7A26}} | |||
[[Category:7000 series vertical plugins]] |