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{{Oscilloscope Sidebar| | |||
The '''Tektronix 570''' is a curve tracer for tubes | title=Tektronix 570 | | ||
image=Tektronix-570-Outside-Front.jpg | | |||
caption=Tektronix 570 front | | |||
introduced=1955 | | |||
discontinued=(?) | | |||
summary=Curve tracer for tubes | | |||
manuals= | |||
* [http://w140.com/tek_570_rk.pdf Tektronix 570 Manual 070-167 (good quality, OCR, PDF)] | |||
* [http://w140.com/tek_570_manual_070-359_7-63.pdf Tektronix 570 Manual (good quality, PDF)] | |||
* [http://w140.com/mmm/tek-570.pdf Tektronix 570 Manual (mediocre quality, PDF)] | |||
* [http://w140.com/tek_fcp/tek_570_fac_cal.pdf Tektronix 570 Factory Calibration Procedure (PDF)] | |||
}} | |||
The '''Tektronix 570''' is a curve tracer for tubes, introduced in 1955. | |||
It sweeps the plate voltage between zero and a selectable maximum voltage | It sweeps the plate voltage between zero and a selectable maximum voltage | ||
while "stepping" the control grid through a set of voltages. | while "stepping" the control grid through a set of voltages. | ||
A selectable screen voltage is available for testing tubes with screens. The plate voltage is measured and applied | A selectable screen voltage is available for testing tubes with screens. | ||
to the X-axis of the display. | The plate voltage is measured and applied to the X-axis of the display. | ||
is applied to the Y-axis of the display. | Plate current is measured and amplified and is applied to the Y-axis of the display. | ||
{{MissingSpecs}} | |||
==Internals== | |||
The 570 contains five transformers: | The 570 contains five transformers: | ||
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The second stage is a differential amplifier made of both halves of a [[6BQ7A]]. | The second stage is a differential amplifier made of both halves of a [[6BQ7A]]. | ||
==Pictures== | |||
<gallery> | <gallery> | ||
Revision as of 03:52, 1 November 2016
The Tektronix 570 is a curve tracer for tubes, introduced in 1955. It sweeps the plate voltage between zero and a selectable maximum voltage while "stepping" the control grid through a set of voltages.
A selectable screen voltage is available for testing tubes with screens. The plate voltage is measured and applied to the X-axis of the display. Plate current is measured and amplified and is applied to the Y-axis of the display.
Key Specifications
- please add
Internals
The 570 contains five transformers:
- T310: center-tapped isolation transformer for plate sweep
- T340: multitap transformer for heater voltages
- T401: multitap autotransformer for selecting peak plate voltage, feeds T310
- T501: transformer for floating supplies and screen voltage supply
- T620: transformer for 60kHz HV power oscillator for CRT voltages
The screen supply is regulated and uses a 6CD6GA tube as the series regulator.
The vertical and horizontal amplifiers are almost identical. The first stage is a differential amplifier made of two 6AU6 tubes. The second stage is a differential amplifier made of both halves of a 6BQ7A.
