7A26: Difference between revisions
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{{Plugin Sidebar 2 | | {{Plugin Sidebar 2 | | ||
manufacturer=Tektronix | type=7A26 | | |||
summary=200 MHz dual channel vertical amplifier | | summary=200 MHz dual channel vertical amplifier | | ||
image=Tek 7a26 front_lc.jpg | | image=Tek 7a26 front_lc.jpg | | ||
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introduced=1974 | | introduced=1974 | | ||
discontinued=1991 | | discontinued=1991 | | ||
series= | series=7000-series scopes| | ||
manuals= | manuals= | ||
* [http://bama.edebris.com/download/tek/7a26/tek-7a26.pdf Tektronix 7A26 Manual (PDF)] | * [http://bama.edebris.com/download/tek/7a26/tek-7a26.pdf Tektronix 7A26 Manual (PDF)] | ||
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* [[Media:070-1484-01.pdf|7A26 Instruction Manual, part no 070-1484-01 (OCR, PDF)]] | * [[Media:070-1484-01.pdf|7A26 Instruction Manual, part no 070-1484-01 (OCR, PDF)]] | ||
}} | }} | ||
The '''Tektronix 7A26''' is a 200 MHz dual-trace vertical plug-in for [[7000-series scopes]]. | 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. | 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}} | ||
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==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]]. | ||
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Tek-7a26-left.jpg | left side | Tek-7a26-left.jpg | left side | ||
Tek-7a26-right.jpg | right 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] | 7a26-cowboy.png | [[Tektronix Cartoons|Cartoon]] in schematic: [http://www.reprise.com/host/tektronix/humor/cowboy.asp The 7A26 Sharp Shooter] | ||
</gallery> | </gallery> | ||
[[Category:7000 series vertical plugins]] | [[Category:7000 series vertical plugins]] | ||
Revision as of 02:35, 9 August 2021
Template:Plugin Sidebar 2 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 |
|---|---|
| Input impedance | 1 MΩ // 22 pF |
| Deflection factor | 5 mV/Div – 5 V/Div in 1–2–5 sequence |
| Features | Bandwidth limiting switch (20 MHz) |
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.
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 resoldering.
Links
Pictures
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Front panel
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left side
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right side
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Cartoon in schematic: The 7A26 Sharp Shooter
