581: Difference between revisions
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The somewhat relaxed bandwidth specification improved CRT production yield which had been a problem when the scope | The somewhat relaxed bandwidth specification improved CRT production yield which had been a problem when the scope | ||
was specified to 100 MHz. | was specified to 100 MHz. | ||
The 580 series were the last Tektronix scopes to use [[distributed amplifiers]] for vertical deflection. | |||
==Specifications== | ==Specifications== | ||
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==Pictures== | ==Pictures== | ||
<gallery> | <gallery> | ||
File:581_old_1.JPG | early 581 | |||
File:581_old_2.JPG | wrinkle and chrome from early 581. | |||
File:581_triggermods.JPG | TD trigger instead of 6DJ8 trigger. | |||
File:Tek 581 1.jpg | |||
File:Tek 581 2.jpg | |||
File:Tek 581 3.jpg | |||
File:Tek 581 5.jpg | |||
File:Tek 581 early trig.png|early model 581 trigger using tubes | File:Tek 581 early trig.png | early model 581 trigger using tubes | ||
File:Tek 581 late trig.png|late model 581 trigger using tunnel diode | File:Tek 581 late trig.png |late model 581 trigger using tunnel diode | ||
File:Tek 581 vertical output amp.png|581 vertical output amp driving CRT | File:Tek 581 vertical output amp.png | 581 vertical output amp ([[distributed amplifier]]) driving CRT | ||
</gallery> | </gallery> | ||
[[Category:580 series scopes]] | [[Category:580 series scopes]] | ||
Revision as of 02:51, 13 May 2015
The Tektronix 581 is a 100 MHz tube scope similar to the 585, but with simplified trigger and sweep circuitry.
Like all 580-series scopes, it uses 580-series plug-ins.
It was introduced in 1959.
The vertical signal path of the 581 is the same as that of the 585. It uses the T581 CRT. Type 581 scopes with serial numbers up to 510 use an all-tube trigger circuit.
Starting at serial number 511, the 581 uses tunnel diode triggering.
A Type 581A was introduced later, and it is specified to have a bandwidth of 85 MHz instead of 100 MHz. The somewhat relaxed bandwidth specification improved CRT production yield which had been a problem when the scope was specified to 100 MHz.
The 580 series were the last Tektronix scopes to use distributed amplifiers for vertical deflection.
Specifications
please add
Pictures
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early 581
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wrinkle and chrome from early 581.
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TD trigger instead of 6DJ8 trigger.
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early model 581 trigger using tubes
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late model 581 trigger using tunnel diode
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581 vertical output amp (distributed amplifier) driving CRT
