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3S76: Difference between revisions
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Undo revision 92826 by Jadney (talk) removed duplicate repair note
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{{Plugin Sidebar | {{Plugin Sidebar | ||
|manufacturer=Tektronix | |||
summary=Dual Channel Sampling plug-in | | |series=560-series scopes | ||
image=Tek 3s76 front.jpg | | |type=3S76 | ||
caption=Tektronix 3S76 | |summary=Dual Channel Sampling plug-in | ||
|image=Tek 3s76 front.jpg | |||
introduced=1962 | | |caption=Tektronix 3S76 Front | ||
discontinued=(?) | | |designers=Cliff Moulton; Ron Olson; Charlie Rhodes; Walt Lowy; Phil Crosby | ||
manuals= | |introduced=1962 | ||
* [ | |discontinued=(?) | ||
* [ | |manuals= | ||
* [ | * [[Media:070-332.pdf|Tektronix 3S76 Manual]] | ||
* [[Media:Tek_3s76_schematics.pdf|Tektronix 3S76 Schematics]] | |||
* [[Media:Tek 3s76 cal outline.pdf|Tektronix 3S76 Calibration Outline]] (OCR) | |||
}} | }} | ||
The '''Tektronix 3S76''' is a dual-trace [[sampling oscilloscope|sampling]] plug-in for [[560-series scopes]]. | The '''Tektronix 3S76''' is a dual-trace [[sampling oscilloscope|sampling]] plug-in for [[560-series scopes]]. | ||
The inputs have 50 Ω impedance and use [[GR-874 connector]]s. Rise time is rated at less than 0.4 ns. | The inputs have 50 Ω impedance and use [[GR-874 connector]]s. Rise time is rated at less than 0.4 ns. | ||
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The 76 project landed in the TV group. | The 76 project landed in the TV group. | ||
[[Ron Olson]] and [[Charlie Rhodes]] were designing it and [[Walt Lowy]] was a technician. | [[Ron Olson]] and [[Charlie Rhodes]] were designing it and [[Walt Lowy]] was a technician. | ||
[[Phil Crosby]] worked | [[Phil Crosby]] worked on it for a week during spring break from Portland State (college then, not university). | ||
Phil Crosby designed the channel switching circuitry. | |||
{{BeginSpecs}} | {{BeginSpecs}} | ||
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{{Spec | Triggering | Internal trigger take-off, 55 ns delay line }} | {{Spec | Triggering | Internal trigger take-off, 55 ns delay line }} | ||
{{EndSpecs}} | {{EndSpecs}} | ||
Early 3S76 units are marked ''RT. ≈ 0.4 nSEC'' on the front panel. | |||
Later 3S76 units are marked ''RT. ≤ 0.4 nSEC'' on the front panel. | |||
==Internals== | ==Internals== | ||
The 3S76 contains 10 Germanium transistors in TO-7 cases, which are prone to failure due to internal growth of tin whiskers. See the '''Repairs''' tab about replacing these with 2N3906s. | |||
Each input has a trigger takeoff transformer and a 55 ns coaxial [[delay line]]. | Each input has a trigger takeoff transformer and a 55 ns coaxial [[delay line]]. | ||
The trigger source channel is selectable. | The trigger source channel is selectable. | ||
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<gallery> | <gallery> | ||
Tek 3s76 front.jpg| | Tek 3s76 front.jpg| 3S76 Front | ||
Tek 3s76 right.jpg | Tek 3s76 right.jpg| 3S76 Right Side | ||
Tek 3s76 bottom.jpg | Tek 3s76 bottom.jpg| 3S76 Bottom | ||
Tek 3s76 left.jpg | Tek 3s76 left.jpg| 3S76 Left Side | ||
Tek 3s76 top.jpg | Tek 3s76 top.jpg| 3S76 Top | ||
Tek 3s76 sampling bridge.jpg | Tek 3s76 sampling bridge.jpg| 3S76 Sampling Bridge | ||
Tek 3s76 sampler.png|Sampler | Tek 3s76 sampler.png|Sampler Schematic | ||
Tek 3s76 fb.jpg | Tek 3s76 fb.jpg | 3S76 Lower Front | ||
Tek 3s76 early.jpg|Early 3S76, SN 000815 | |||
</gallery> | </gallery> | ||
==Components== | |||
{{Parts|3S76}} | |||
[[Category:Sampling plugins]] | [[Category:Sampling plugins]] | ||
[[Category:560 series plugins]] | [[Category:560 series plugins]] | ||