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The Tektronix 570 is a curve tracer for tubes. It sweeps the plate voltage between zero and a selectable maximum voltage | The '''Tektronix 570''' is a curve tracer for tubes. 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. The plate voltage is measured and applied | ||
to the X-axis of the display. The plate current is measured and amplified and | to the X-axis of the display. The plate current is measured and amplified and | ||
is applied to the Y-axis of the display. | is applied to the Y-axis of the display. | ||
The 570 contains five transformers: | The 570 contains five transformers: | ||
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[[Category:Specifications needed]] | [[Category:Specifications needed]] | ||
[[Category:Introduced in 1955]] | |||
Revision as of 01:34, 31 August 2014
The Tektronix 570 is a curve tracer for tubes. 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. The plate current is measured and amplified and is applied to the Y-axis of the display.
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.
