517: Difference between revisions

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* [http://w140.com/tek_517_517a_OCR.pdf Later Manual Covering the 517 and 517A (PDF, OCR)]
* [http://w140.com/tek_517_517a_OCR.pdf Later Manual Covering the 517 and 517A (PDF, OCR)]
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The '''Tektronix 517''' is a 50 MHz scope [[introduced in 1950]] or [[introduced in 1951|1951]]. The power supply is an external box, like the [[507]], [[551]] and [[555]].  [[Category:Introduced in 1950]]
The '''Tektronix 517''' is a 50 MHz scope [[introduced in 1950]] or [[introduced in 1951|1951]].
The power supply is an external box, like the [[507]], [[551]] and [[555]].  [[Category:Introduced in 1950]]
The 517 does not take plug-ins.  There is also a 517A (1955-1965).
The 517 does not take plug-ins.  There is also a 517A (1955-1965).


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Tektronix engineer [[Frank Hood]] recollects:
Tektronix engineer [[Frank Hood]] recollects:
<blockquote>
<blockquote>
"A lot of progress was made in 1949 and 1950. Work was well underway by [[Logan Belleville]], [[Dick Rhiger]] and [[Howard Vollum|Howard]] on the high speed scope, the 517. This used some brand new circuitry, [[distributed amplifier|distributed (or chain) amplifiers]], using 16 to 20 tubes in each stage to get the power needed to handle the high frequencies. Our best prediction at that time was that there were only about 30 to 50 people in the whole world who had need of a scope with 60 to 100 megacycle bandwidth. As it turned out, when we brought out a higher speed scope, people were able to design equipment of greater bandwidth and needed even faster measuring instruments. The cycle was regenerative. Having faster, more accurate measuring tools created a demand for even more measuring tools. We eventually sold several thousand of this instrument."
"A lot of progress was made in 1949 and 1950.  
Work was well underway by [[Logan Belleville]], [[Dick Rhiger]] and [[Howard Vollum|Howard]]
on the high speed scope, the 517.
This used some brand new circuitry, [[distributed amplifier|distributed (or chain) amplifiers]],
using 16 to 20 tubes in each stage to get the power needed to handle the high frequencies.
Our best prediction at that time was that there were only about 30 to 50 people in the whole world
who had need of a scope with 60 to 100 megacycle bandwidth.
As it turned out, when we brought out a higher speed scope,
people were able to design equipment of greater bandwidth and needed even faster measuring instruments.
The cycle was regenerative.
Having faster, more accurate measuring tools created a demand for even more measuring tools.
We eventually sold several thousand of this instrument."
</blockquote>
</blockquote>


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Units with serial numbers from 101 through 1739 use 12-pin Jones 2412 connectors;  
Units with serial numbers from 101 through 1739 use 12-pin Jones 2412 connectors;  
after that it is a 16-pin Jones connector.  
after that it is a 16-pin Jones connector.  
''(Was a 16-pin Jones connector used or did they go directory from the 12-pin Jones connector to the 16-pin Amphenol power connector used by the [[555]]?)''
''(Was a 16-pin Jones connector used or did they go directory from the 12-pin Jones connector
to the 16-pin Amphenol power connector used by the [[555]]?)''


The voltages on the 12-pin connector are:
The voltages on the 12-pin connector are:
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==Pictures of 517 ==
==Pictures of 517 ==
<gallery>
<gallery>
File:517_cat_whole.jpg|front
517_cat_whole.jpg|front
File:517_cat_int_left.jpg|bottom internal
517_cat_int_left.jpg|bottom internal
File:517_cat_int_right.jpg|right internal
517_cat_int_right.jpg|right internal
File:517_cat_int_top.jpg|top internal
517_cat_int_top.jpg|top internal
File:517_cat_ps_int.jpg|power supply internal
517_cat_ps_int.jpg|power supply internal
File:517 power connector.jpg|12-pin Jones socket on power supply
517 power connector.jpg|12-pin Jones socket on power supply
File:Jones 12pin male.jpg|12-pin Jones plug
Jones 12pin male.jpg|12-pin Jones plug
File:Jones 12m inside.jpg|12-pin Jones plug inside
Jones 12m inside.jpg|12-pin Jones plug inside
File:Tek 517 420 hv.jpg|High voltage supply
Tek 517 420 hv.jpg|High voltage supply
File:Tek 517 front.jpg|Front view
Tek 517 front.jpg|Front view
File:Tek 517 indicator jones.jpg|12-pin Jones connector on indicator unit
Tek 517 indicator jones.jpg|12-pin Jones connector on indicator unit
File:Tek 517 left.jpg|Left internal view
Tek 517 left.jpg|Left internal view
File:Tek 517 vert output.jpg|Distributed vertical output amplifier
Tek 517 vert output.jpg|Distributed vertical output amplifier
File:Tek 517 wood cap support.jpg|Wooden support for capacitor C826
Tek 517 wood cap support.jpg|Wooden support for capacitor C826
File:Tek crt table.png|Tek CRT Reference Chart
Tek crt table.png|Tek CRT Reference Chart
File:517 trig amp underside.jpg
517 trig amp underside.jpg
File:517 vert stages one through three.jpg
517 vert stages one through three.jpg
File:517 4th vert stage.jpg
517 4th vert stage.jpg
File:517 right internals.jpg
517 right internals.jpg
File:517 timing switch 2.jpg
517 timing switch 2.jpg
File:517 timing switch 1.jpg
517 timing switch 1.jpg
File:517 power test point.jpg
517 power test point.jpg
File:517 hv osc.jpg
517 hv osc.jpg
File:Tek 517a vert pre.png | Vertical pre-amplifier circuit
Tek 517a vert pre.png | Vertical pre-amplifier circuit
File:Tek 517a vert amp.png | Vertical amplifier circuit
Tek 517a vert amp.png | Vertical amplifier circuit
File:Tek 517a trigger amp.png | Trigger amplifier circuit
Tek 517a trigger amp.png | Trigger amplifier circuit
File:Tek 517 late sweep.png |
Tek 517 late sweep.png |
File:Tek 517a crt circuit.png | CRT circuit  
Tek 517a crt circuit.png | CRT circuit  
File:Tek 517a trigger rate gen.png |  
Tek 517a trigger rate gen.png |  
File:Tek 517 hvps2.png | High-voltage power supply circuit  
Tek 517 hvps2.png | High-voltage power supply circuit  
File:517 ps fan.jpg
517 ps fan.jpg
File:517 ps bottom left.jpg
517 ps bottom left.jpg
File:517 ps bottom right.jpg
517 ps bottom right.jpg
File:517 ps front left int.jpg
517 ps front left int.jpg
File:517 ps right rear bottom.jpg
517 ps right rear bottom.jpg
File:517 ps bottom.jpg
517 ps bottom.jpg
File:517 ps right int.jpg
517 ps right int.jpg
File:517 assembly2.jpg
517 assembly2.jpg
File:B170_A.JPG| 170 ohms Attenuator  
B170_A.JPG| 170 ohms Attenuator  
File:Tek 517 ad.jpg
Tek 517 ad.jpg
File:517a rear vert interface.jpg|Direct CRT access mod
517a rear vert interface.jpg|Direct CRT access mod
File:517a single sweep controls.jpg|Single-sweep mod
517a single sweep controls.jpg|Single-sweep mod
Tek 517 735 on cart.jpg
Tek 517 735 on cart.jpg
Tek 517 735 left.jpg
Tek 517 735 left.jpg

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