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511: Difference between revisions
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{{Oscilloscope Sidebar | {{Oscilloscope Sidebar TEST | ||
|manufacturer=Tektronix | |manufacturer=Tektronix | ||
|series= | |series= | ||
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* [[Media:1947_Tektronix_Catalog.pdf|Tektronix 1947 "Catalog" (511 only)]] | * [[Media:1947_Tektronix_Catalog.pdf|Tektronix 1947 "Catalog" (511 only)]] | ||
}} | }} | ||
The 511 was Tektronix' '''first oscilloscope''', [[introduced in 1947|introduced in June 1947]] but only the second product released by the young company – the first was the [[101|Type 101 Video Calibrator]]. | The 511 was Tektronix' '''first oscilloscope''', [[introduced in 1947|introduced in June 1947]] but only the second product released by the young company – the first was the [[101|Type 101 Video Calibrator]]. | ||
[[Howard Vollum]] was directly involved with the design of the 511. | [[Howard Vollum]] was directly involved with the design of the 511. | ||
__TOC__ | |||
According to TekWeek March 23, 1984, ''"511" stood for 5-inch tube, 1 channel, 1st model. It sold for $795<sup>[Note 1]</sup>, compared to $1,800 for a two-piece Dumont scope that was mostly pre-war technology.'' | According to TekWeek March 23, 1984, ''"511" stood for 5-inch tube, 1 channel, 1st model. It sold for $795<sup>[Note 1]</sup>, compared to $1,800 for a two-piece Dumont scope that was mostly pre-war technology.'' | ||
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{{Spec | Bandwidth | 5 Hz to 10 MHz (8 MHz with 2-stage amplifier); no DC coupling }} | {{Spec | Bandwidth | 5 Hz to 10 MHz (8 MHz with 2-stage amplifier); no DC coupling }} | ||
{{Spec | Rise time | 40 ns (50 ns with 2-stage amplifier) }} | {{Spec | Rise time | 40 ns (50 ns with 2-stage amplifier) }} | ||
{{Spec | Deflection | Without amplifier, 27 V | {{Spec | Deflection | Without amplifier, 27 V/cm – 200 V/cm, DC or AC<sub>p-p</sub>. 1-stage amplifier, 2.7 V/cm – 40 V/cm. 2-stage amplifier, 0.27 V/cm – 4 V/cm. }} | ||
{{Spec | Input | 1 MΩ // 40 pF; 600 V max. DC+peak AC }} | {{Spec | Input | 1 MΩ // 40 pF; 600 V max. DC+peak AC }} | ||
{{Spec | Sweep | 100 ns/cm to 10 ms/cm + variable; ×5 magnifier }} | {{Spec | Sweep | 100 ns/cm to 10 ms/cm + variable; ×5 magnifier }} | ||
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{{Spec | Outputs | Sweep sawtooth, 20 V<sub>p-p</sub>; Positive and negative gate, 40 V<sub>p-p</sub> }} | {{Spec | Outputs | Sweep sawtooth, 20 V<sub>p-p</sub>; Positive and negative gate, 40 V<sub>p-p</sub> }} | ||
{{Spec | Weight | 511 – 29 kg (65 lb); 511A – 23 kg (50 lb); }} | {{Spec | Weight | 511 – 29 kg (65 lb); 511A – 23 kg (50 lb); }} | ||
{{Spec | Dimensions | 15½" high, 12½" wide, | {{Spec | Dimensions | 15½" high, 12½" wide, 21½" deep }} | ||
{{Spec | Power | 511 – 180 W; 511A – 105-125 or 210-250 V, 50-60 Hz, 230 W }} | {{Spec | Power | 511 – 180 W; 511A – 105-125 or 210-250 V, 50-60 Hz, 230 W }} | ||
{{EndSpecs}} | {{EndSpecs}} | ||
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==History== | ==History== | ||
The 511 was designed by [[Frank Hood]], [[Logan Belleville]], and [[Howard Vollum]]. | |||
* See also https://vintagetek.org/tektronix-first-products/ | * See also https://vintagetek.org/tektronix-first-products/ | ||
Tektronix engineer [[Frank Hood]] recollects: | Tektronix engineer [[Frank Hood]] recollects: | ||
<blockquote>My first assignment was to build or modify some special instruments for Bonneville Power. They wanted a device that would detect and record any lightning strikes or arc-overs on the high voltage power lines running between Vancouver, Wash. and other cities such as Longview, Spokane, etc. They wanted to detect each event, in a fraction of a millionth of a second, then to send a pulse of energy down the defective line and measure the time it took to return, (this was an application much like radar). They wanted markers displayed at each mile and fraction of a mile so that they could determine the exact location of the fault. They needed to record a photographic image for | <blockquote>My first assignment was to build or modify some special instruments for Bonneville Power. They wanted a device that would detect and record any lightning strikes or arc-overs on the high voltage power lines running between Vancouver, Wash. and other cities such as Longview, Spokane, etc. They wanted to detect each event, in a fraction of a millionth of a second, then to send a pulse of energy down the defective line and measure the time it took to return, (this was an application much like radar). They wanted markers displayed at each mile and fraction of a mile so that they could determine the exact location of the fault. They needed to record a photographic image for later study. Two or more such instruments were built. We called these Type 511B. They worked very well and were used for several years. | ||
</blockquote> | </blockquote> | ||
[[John Addis]] says: | [[John Addis]] says: | ||
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Tek 511 3.jpg | Tek 511 3.jpg | ||
Tek 511 4.jpg | Tek 511 4.jpg | ||
Tektronix 511 sn305 front panel.jpg | 511 sn305 Front | |||
Tektronix 511 sn305 top uncovered.jpg | 511 sn305 Top | |||
Tektronix 511 sn305 bottom uncovered.jpg | 511 sn305 Bottom | |||
Tektronix 511 sn305 back uncovered.jpg | 511 sn305 Back | |||
Tektronix 511 sn305 sweep side uncovered.jpg | 511 sn305 Sweep chassis | |||
Tektronix 511 sn305 power supply and video amplifier side uncovered.jpg | 511 sn305 Power Supply, Video Amplifier | |||
Tektronix 511 sn305 back of crt controls without HV shroud.jpg | 511 sn305 HV shroud | |||
Vollum scope - Electronics Magazine April 1948.jpg | Vollum scope - Electronics Magazine, April 1948 | Vollum scope - Electronics Magazine April 1948.jpg | Vollum scope - Electronics Magazine, April 1948 | ||
Septad511.jpg|511 ad from September 1948 | Septad511.jpg|511 ad from September 1948 | ||
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</gallery> | </gallery> | ||
== | ==Components== | ||
{{Parts|511}} | {{Parts|511}} | ||
{{Parts|511A}} | {{Parts|511A}} | ||
[[Category:Monolithic tube scopes]] | [[Category:Monolithic tube scopes]] | ||