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517: Difference between revisions
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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)]] ( | * [[Media:IM-517.pdf|Early 517 Manual (IM-517)]] (OCR) | ||
* [[Media:070-229.pdf|Later Manual (070-229) Covering the 517 and 517A]] ( | * [[Media:070-229.pdf|Later Manual (070-229) Covering the 517 and 517A]] (OCR) | ||
* [[Media:Tek_517_calibration_guide.pdf|Tektronix 517 Calibration Guide]] ( | * [[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 | * 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 " | 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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