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series=[[580-series scopes]]| | series=[[580-series scopes]]| | ||
manuals= | manuals= | ||
* [ | * [[Media:070-232.pdf|Tektronix Type 81 Manual]] (PDF) | ||
* [ | * [[Media:070-0751-00.pdf|Tektronix Type 81A Manual]] (PDF) | ||
* [http://w140.com/tek_fcp/tek_type_81_factory_cal_proc.pdf | <small> | ||
* [[Media:Tek 81a fcp may 1967.pdf]] | '''Factory Calibration Procedures''' | ||
* [http://w140.com/tek_fcp/tek_type_81_factory_cal_proc.pdf Type 81 FCP] (PDF) | |||
* [[Media:Tek 81a fcp may 1967.pdf|Type 81A FCP]] (PDF) | |||
</small> | |||
}} | }} | ||
The '''Tektronix Type 81''' is a plug-in adapter so that | The '''Tektronix Type 81''' is a plug-in adapter so that | ||
Revision as of 07:42, 22 January 2021
Template:Plugin Sidebar 2 The Tektronix Type 81 is a plug-in adapter so that letter-series and 1-series plug-ins can be used in 580-series scopes.
The 81 and 81A are significantly different. Type 81 is tube-based and has a bandwidth of 33 MHz. Type 81A is solid-state and has a bandwidth of 50 MHz. The 81A was designed by John Gates.
Specifications
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Internals
The Type 81 contains a two-stage amplifier. The letter-series plug-in drives the input stage of the Type 81 which is high impedance (grids of a 6GM8 stage with T-coil peaking) so that the plug-in sees conditions similar to the input of a 530-, 540-, or 550-series scope. The second stage is a 6DJ8 cathode-follower, which drives the 580-series scope's 93 Ω input impedance. Type 81 also terminates the grid line of the distributed vertical amplifier (delay line driver).
Type 81A has a FET source follower pair followed by cascoded BJT amplifiers.
The Type 81 does not have a spoiler switch. The Type 81A has a spoiler switch.
Pictures
Type 81
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Type 81 Schematic
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Type 81
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Type 81
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Type 81
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Type 81
Type 81A
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Type 81A
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Type 81A
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Type 81A
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Type 81A
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Type 81A
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Type 81A
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Type 81A
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Type 81A Schematic
