517: Difference between revisions
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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 the [[507]], [[551]] and [[555]]. | ||
The 517 does not take plug-ins. | The 517 does not take plug-ins. | ||
There is also a 517A (1955-1965). | |||
==Specifications== | ==Specifications== | ||
The power consumption of a 517 is 1250 watts. | The power consumption of a 517 is 1250 watts. | ||
The indicator unit weighs 76 pounds and the external | |||
power supply weighs 72 pounds. | power supply weighs 72 pounds. | ||
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The 517 uses 24 kV total acceleration voltage on the CRT. | The 517 uses 24 kV total acceleration voltage on the CRT. | ||
This is generated by the [[420|Type 420]] High Voltage Power Supply subsystem in the 517. | This is generated by the [[420|Type 420]] High Voltage Power Supply subsystem in the 517. | ||
It uses a 1.8 kHz oscillator to produce the high voltage, unlike other Tek scopes which use HV oscillators in the ultrasonic range. | It uses a 1.8 kHz oscillator to produce the high voltage, | ||
unlike other Tek scopes which use HV oscillators in the ultrasonic range. | |||
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 "X2" 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 | In 1965, following the introduction of the 50 MHz [[547]], the 517 was discontinued. | ||
517 was discontinued. | The 547 uses a non-distributed solid-state vertical amplifier, | ||
amplifier, [[tunnel diodes|tunnel diode]] triggering, and a 6.5 V/cm CRT, | [[tunnel diodes|tunnel diode]] triggering, and a 6.5 V/cm CRT, | ||
thereby achieving good performance with | thereby achieving good performance with | ||
lower cost, size, weight, complexity, and power consumption than the 517. | lower cost, size, weight, complexity, and power consumption than the 517. | ||
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==Pictures of 517A == | ==Pictures of 517A == | ||
<gallery> | <gallery> | ||
517A_1.JPG |517A Front | |||
517A_2.JPG |517A Power Supply | |||
6_57.JPG |517A with cart | |||
</gallery> | </gallery> | ||
[[Category:Monolithic tube scopes]] | [[Category:Monolithic tube scopes]] | ||
[[Category:Introduced in 1950]] | |||