585: Difference between revisions
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[[introduced_in_1959|1959]] and made through the 1960's. | [[introduced_in_1959|1959]] and made through the 1960's. | ||
== Plug-in Interface == | ==Specifications== | ||
[[Category:Specifications needed]] ''please add'' | |||
==Internals== | |||
=== Plug-in Interface === | |||
The 585 uses [[580-series plug-ins]], which look like [[letter-series and 1-series plug-ins]] | The 585 uses [[580-series plug-ins]], which look like [[letter-series and 1-series plug-ins]] | ||
but are electrically different, primarily in the impedance of the signal interface | but are electrically different, primarily in the impedance of the signal interface | ||
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The [[81|Type 81]] adapter allows the use of letter-series and 1-series plug-ins in a 585. | The [[81|Type 81]] adapter allows the use of letter-series and 1-series plug-ins in a 585. | ||
== Trigger Circuit == | === Trigger Circuit === | ||
The original 585 (up to serial number 1070) has an "A" trigger circuit that has a differential | The original 585 (up to serial number 1070) has an "A" trigger circuit that has a differential | ||
trigger amplifier made of a pair of [[6EW6]] miniature pentodes, followed by a Schmitt trigger | trigger amplifier made of a pair of [[6EW6]] miniature pentodes, followed by a Schmitt trigger | ||
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transistor. The tunnel diode is AC-coupled to the base-emitter junction of the transistor. | transistor. The tunnel diode is AC-coupled to the base-emitter junction of the transistor. | ||
== Vertical Signal Path == | === Vertical Signal Path === | ||
Like the [[545]], [[551]], and [[555]], the 585 uses a [[distributed amplifier]] for vertical | Like the [[545]], [[551]], and [[555]], the 585 uses a [[distributed amplifier]] for vertical | ||
deflection. Unlike the other 500-series scopes, the 585 uses a CRT with distributed vertical | deflection. Unlike the other 500-series scopes, the 585 uses a CRT with distributed vertical | ||
deflection plates, the [[T581]], enabling it to have both high sensitivity and fast risetime. | deflection plates, the [[T581]], enabling it to have both high sensitivity and fast risetime. | ||
Total CRT acceleration voltage is 10 kV. | |||
Several improvements were published for the 585 circuitry, including the enhanced trigger circuit. | Several improvements were published for the 585 circuitry, including the enhanced trigger circuit. | ||
If all of those changes are applied to a 585, it is essentially a 585A. | If all of those changes are applied to a 585, it is essentially a 585A. | ||
== Rackmount Versions == | === Rackmount Versions === | ||
Rackmount versions were also made, the RM585 and RM585A. | Rackmount versions were also made, the RM585 and RM585A. | ||
==Pictures== | ==Pictures== | ||
Revision as of 00:00, 2 September 2014
The Tektronix 585 is a 100 MHz 580-Series scope introduced by Tektronix in 1959 and made through the 1960's.
Specifications
please add
Internals
Plug-in Interface
The 585 uses 580-series plug-ins, which look like letter-series and 1-series plug-ins but are electrically different, primarily in the impedance of the signal interface between the plug-in and the scope.
The Type 81 adapter allows the use of letter-series and 1-series plug-ins in a 585.
Trigger Circuit
The original 585 (up to serial number 1070) has an "A" trigger circuit that has a differential trigger amplifier made of a pair of 6EW6 miniature pentodes, followed by a Schmitt trigger made of a pair of miniature dual triode tubes.
Starting at serial number 1071, the miniature dual triode Schmitt trigger was replaced by a 10 mA tunnel diode and a pulse amplifier made with an OC171 germanium PNP transistor. The tunnel diode is AC-coupled to the base-emitter junction of the transistor.
Vertical Signal Path
Like the 545, 551, and 555, the 585 uses a distributed amplifier for vertical deflection. Unlike the other 500-series scopes, the 585 uses a CRT with distributed vertical deflection plates, the T581, enabling it to have both high sensitivity and fast risetime. Total CRT acceleration voltage is 10 kV.
Several improvements were published for the 585 circuitry, including the enhanced trigger circuit. If all of those changes are applied to a 585, it is essentially a 585A.
Rackmount Versions
Rackmount versions were also made, the RM585 and RM585A.
Pictures
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Front view.
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585A trigger circuit.
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White plastic clip holds tunnel diode for triggering.
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Inside view shows regulator tubes.
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Distributed vertical amplifier.
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RM-585A
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T5810P31 distributed deflection plate.
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