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{{Plugin Sidebar | {{Plugin Sidebar | ||
|manufacturer=Tektronix | |||
summary=Plugin Adapter| | |type=Type 81 | ||
image=81.JPG | | |summary=Plugin Adapter | ||
caption=Type 81 front view| | |image=81.JPG | ||
introduced=1960 | | |caption=Type 81 front view | ||
discontinued=1972 | | |introduced=1960 | ||
|discontinued=1972 | |||
series= | |designers=Bill DeVey | ||
manuals= | |series=580-series scopes | ||
|manuals= | |||
* [[Media:070-232.pdf|Tektronix Type 81 Manual]] (PDF) | * [[Media:070-232.pdf|Tektronix Type 81 Manual]] (PDF) | ||
* [[Media:070-0751-00.pdf|Tektronix Type 81A Manual]] (PDF) | * [[Media:070-0751-00.pdf|Tektronix Type 81A Manual]] (PDF) | ||
Revision as of 06:40, 9 August 2021
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 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
