570: Difference between revisions

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* T401: multitap autotransformer for selecting peak plate voltage, feeds T310
* T401: multitap autotransformer for selecting peak plate voltage, feeds T310
* T501: transformer for floating supplies and screen voltage supply
* T501: transformer for floating supplies and screen voltage supply
* T620: transformer for 60kHz HV power oscillator for CRT voltages
* T620: transformer for 60 kHz HV power oscillator for CRT voltages


The screen supply is regulated and uses a [[6CD6GA]] tube as the series
The screen supply is regulated and uses a [[6CD6GA]] tube as the series

Revision as of 00:11, 27 June 2018

{{{manufacturer}}} 
Curve tracer for tubes
Tektronix 570 front

Produced from 1955 to (?)

Manuals
Manuals – Specifications – Links – Pictures

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 60 kHz 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.

Pictures