517: Difference between revisions

10 bytes removed ,  20 July 2022
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|designers=Logan Belleville;Dick Rhiger  
|designers=Logan Belleville;Dick Rhiger  
|manuals=
|manuals=
* [[Media:IM-517.pdf|Early 517 Manual (IM-517)]] (PDF, OCR)
* [[Media:IM-517.pdf|Early 517 Manual (IM-517)]] (OCR)
* [[Media:070-229.pdf|Later Manual (070-229) Covering the 517 and 517A]] (PDF, OCR)
* [[Media:070-229.pdf|Later Manual (070-229) Covering the 517 and 517A]] (OCR)
* [[Media:Tek_517_calibration_guide.pdf|Tektronix 517 Calibration Guide]] (PDF, OCR)
* [[Media:Tek_517_calibration_guide.pdf|Tektronix 517 Calibration Guide]] (OCR)
}}
}}
The '''Tektronix 517''' is a 50 MHz scope [[introduced in 1950]] or [[introduced in 1951|1951]].
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]].
The power supply is an external box, like in the [[507]], [[551]] and [[555]].
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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* Gain Stage 3: single-ended, seven sections, distributed, [[6AK5]] pentodes  
* Gain Stage 3: single-ended, seven sections, distributed, [[6AK5]] pentodes  
* Trig Pickoff: one common-cathode [[6CB6]] pentode
* Trig Pickoff: one common-cathode [[6CB6]] pentode
* Signal Delay: 51 feet of RG63U 125-ohm coaxial cable (65ns)
* Signal Delay: 51 feet of RG63U 125 Ω coaxial cable (65 ns)
* Phase Splitter: single-ended in, differential out, three sections, distributed, [[6CB6]] pentode
* Phase Splitter: single-ended in, differential out, three sections, distributed, [[6CB6]] pentode
* Gain Stage 4: differential, six sections, distributed, [[6CB6]] pentodes
* Gain Stage 4: differential, six sections, distributed, [[6CB6]] pentodes
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The 517 has a switch on the front panel that selects between normal vertical sensitivity, which uses the full 24 kV acceleration voltage,  
The 517 has a switch on the front panel that selects between normal vertical sensitivity, which uses the full 24 kV acceleration voltage,  
and "X2" mode, which drops the acceleration voltage to 12 kV for a doubling of the vertical sensitivity.   
and "×2" mode, which drops the acceleration voltage to 12 kV for a doubling of the vertical sensitivity.   
The control works by switching the voltage division ratio of the feedback to the error amplifier in the HV supply.
The control works by switching the voltage division ratio of the feedback to the error amplifier in the HV supply.


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== Comparison of 517 with 547 ==
== Comparison of 517 with 547 ==
In 1965, following the introduction of the 50 MHz [[547]], the 517 was discontinued.
In 1965, following the introduction of the 50 MHz [[547]], the 517 was discontinued.
The 547 uses a non-distributed solid-state vertical amplifier, [[tunnel diodes|tunnel diode]] triggering, and a 6.5 V/cm CRT,  
The 547 uses a non-distributed solid-state vertical amplifier, [[tunnel diodes|tunnel diode]] triggering, and a 6.5 V/cm CRT, thereby achieving good performance with lower cost, size, weight, complexity, and power consumption than the 517.
thereby achieving good performance with lower cost, size, weight, complexity, and power consumption than the 517.


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