581: Difference between revisions

581 (view source)

34 bytes removed , 16 September 2018

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-The '''Tektronix 581''' is a 100 MHz tube scope similar to the [[585]], but with simplified trigger and sweep circuitry.
+The '''Tektronix 581''' is a 100 MHz tube scope [[introduced in 1959]] as a single time base version of the [[585]].
 Like all [[580-series_scopes|580-series scopes]], it uses [[580-series_plug-ins|580-series plug-ins]].
-It was [[introduced in 1959]].
 The 58x series were the first Tektronix scopes to use [[distributed deflection plates]] and the last to use [[distributed amplifier]]s for vertical deflection.
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 Starting at serial number 511, the 581 uses [[tunnel diodes|tunnel diode]] triggering.
-A Type 581A was introduced later, and it is specified to have a bandwidth of 85 MHz instead of 100 MHz.
+A Type 581A was introduced in 1963, 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.