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The Tektronix 570 is a curve tracer for tubes.   
{{Instrument Sidebar
|class=Curve Tracer
|manufacturer=Tektronix
|model=570
|summary=Curve tracer for tubes
|image=Tektronix-570-Outside-Front.jpg
|caption=Tektronix 570 front
|introduced=1955
|discontinued=(?)
|designers=John Kobbe
|manuals=
* [[Media:070-167.pdf|Tektronix 570 Manual 070-167 (1955)]] (OCR)
* [[Media:070-359.pdf|Tektronix 570 Manual 070-359 (1963)]]
<!-- * [https://w140.com/mmm/tek-570.pdf Tektronix 570 Manual] (mediocre quality) -->
<!-- * [https://w140.com/tek_fcp/tek_570_fac_cal.pdf 570 Factory Calibration Procedure 1959] -->
<small>
'''Modifications'''
* [[Media:570 Mod Summary.pdf|Tektronix 570 Modification Summaries]]
'''Calibration'''
* [[Media:Tek 570 fcp.pdf|570 Factory Calibration Procedure 1959]]
* [[Media:Tek 570 fcp feb 1964.pdf|570 Factory Calibration Procedure 1964]]
'''Miscellaneous'''
* [[Media:Tek Type 570 Characteristic-curve Tracer Technical Description.pdf|570 Technical Description]]
* [[Media:Tek Type 570 Preliminary Brochure.pdf|570 Preliminary Brochure]]
</small>
}}
The '''Tektronix 570''' was Tek's first curve tracer, [[introduced in 1955]].  It is a curve tracer for vacuum 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. 
Plate current is measured and amplified and is applied to the Y-axis of the display.   
 
[[John Kobbe]] had a key role in the development of both the 570 and [[575]] curve tracers. [https://vintagetek.org/my-early-tektronix-days-by-john-kobbe-2/ He says]:
<blockquote>
While I was working on the [[541|540 series]] vertical amplifier, [[Virgil Briton]], whose bench was next to me, had put together a vacuum tube curve tracer using stepping relays and other mechanical devices. I remember thinking that, that was a neat display even if it did a lot clicking and was slow.
 
After putting the cross hatch generator together, I knew it would be very easy to do the curve tracer electronically, it started for in house use, but after putting a self-contained instrument together, Tek decided to call it 570<ref>The original quote refers to the 575, however, the first curve tracer was the [[570]] in 1955; the [[541]] was released in 1955 as well, and the text continues to tell the [[575]] story. It follows that the instrument referenced is clearly the 570, not the 575, which was released in 1957.</ref> and sell it.
</blockquote>
 
{{MissingSpecs}}
 
==Internals==


The 570 contains five transformers:
The 570 contains five transformers:
* T310: center-tapped isolation transformer for plate sweep
* T310: center-tapped isolation transformer for plate sweep
* T340: multitap transformer for heater voltages
* T340: multitap transformer for heater voltages
* T401: multitap autotransformer for selecting peak plate voltage
* 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 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 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]].


The screen supply is regulated and uses a [[6CD6GA]] tube as the series
A [[T0520|T52P1]] CRT is standard in the 570.
regulator.


* [http://w140.com/mmm/tek-570.pdf Tektronix 570 Manual (PDF)]
==Links==
* https://vintagetek.org/curve-tracers/
* [[Media:Tek 570 10 amp request.pdf|Request from GE for a 10-amp 570]] (1961)


==Pictures==
=== Early Tektronix 570 (Brown Era) ===
<gallery>
Tek570-test-setup.jpg
Tek 570 top controls and storage.jpg
</gallery>
===Tektronix 570 Serial Number 5010===
<gallery>
<gallery>
Image:Tektronix-570-Outside-Front.jpg
Tektronix-570-Outside-Front.jpg
Image:Tektronix-570-Inside-Right.jpg
Tektronix-570-Inside-Right.jpg
Image:Tektronix-570-Inside-Left.jpg
Tektronix-570-Inside-Left.jpg
Image:Tektronix-570-Inside-Left-Close2.jpg
Tektronix-570-Inside-Left-Close2.jpg
Image:Tektronix-570-Inside-Bottom.jpg
Tektronix-570-Inside-Bottom.jpg
Image:Tektronix-570-Inside-Left-Close.jpg
Tektronix-570-Inside-Left-Close.jpg
Image:Tektronix-570-Outside-Front-Close2.jpg
Tektronix-570-Outside-Front-Close2.jpg
Image:Tektronix-570-Inside-Right-Close3.jpg
Tektronix-570-Inside-Right-Close3.jpg
</gallery>
</gallery>
=== Tektronix 570 Serial Number 5055 ===
<gallery>
tek_570_sn5055_1.jpg
tek_570_sn5055_2.jpg
tek_570_sn5055_3.jpg
tek_570_sn5055_4.jpg
tek_570_sn5055_5.jpg
tek_570_sn5055_6.jpg
tek_570_sn5055_7.jpg
tek_570_sn5055_8.jpg
tek_570_sn5055_9.jpg
tek_570_sn5055_10.jpg
tek_570_sn5055_11.jpg
tek_570_sn5055_12.jpg
</gallery>
=== Tektronix 570 Serial Number 5148 ===
<gallery>
tek_570_sn5148_1.jpg
tek_570_sn5148_2.jpg
tek_570_sn5148_3.jpg
tek_570_sn5148_4.jpg
tek_570_sn5148_5.jpg
tek_570_sn5148_6.jpg
tek_570_sn5148_7.jpg
tek_570_sn5148_8.jpg
tek_570_sn5148_9.jpg
tek_570_sn5148_10.jpg
tek_570_sn5148_11.jpg
tek_570_sn5148_12.jpg
</gallery>
=== Tektronix 570 Serial Number 5429 ===
<gallery>
Tek 570 sn5429 1.jpg
Tek 570 sn5429 2.jpg
Tek 570 sn5429 3.jpg
Tek 570 sn5429 4.jpg
Tek 570 sn5429 5.jpg
Tek 570 sn5429 6.jpg
Tek 570 sn5429 7.jpg
</gallery>
===Adaptors for Different Tube Bases===
<gallery>
Tek 570 12-pin fixture 1.jpg|12-pin adaptor
Tek 570 12-pin fixture 2.jpg|12-pin adaptor
Tek 570 seven pin miniature adapter 1.jpg|7-pin miniature adaptor
Tek 570 seven pin miniature adapter 2.jpg|7-pin miniature adaptor
Tek 570 assorted adapters.jpg
</gallery>
==Notes==
<references />
==Components==
{{Parts|570}}
[[Category:Curve tracers]]
[[Category:Specifications needed]]
[[Category:Introduced in 1955]]

Latest revision as of 06:18, 12 August 2024

Tektronix 570
Curve tracer for tubes
Tektronix 570 front

Produced from 1955 to (?)

Manuals
Manuals – Specifications – Links – Pictures

The Tektronix 570 was Tek's first curve tracer, introduced in 1955. It is a curve tracer for vacuum 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. Plate current is measured and amplified and is applied to the Y-axis of the display.

John Kobbe had a key role in the development of both the 570 and 575 curve tracers. He says:

While I was working on the 540 series vertical amplifier, Virgil Briton, whose bench was next to me, had put together a vacuum tube curve tracer using stepping relays and other mechanical devices. I remember thinking that, that was a neat display even if it did a lot clicking and was slow.

After putting the cross hatch generator together, I knew it would be very easy to do the curve tracer electronically, it started for in house use, but after putting a self-contained instrument together, Tek decided to call it 570[1] and sell it.

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.

A T52P1 CRT is standard in the 570.

Links

Pictures

Early Tektronix 570 (Brown Era)

Tektronix 570 Serial Number 5010

Tektronix 570 Serial Number 5055

Tektronix 570 Serial Number 5148

Tektronix 570 Serial Number 5429

Adaptors for Different Tube Bases

  • 12-pin adaptor

    12-pin adaptor

  • 12-pin adaptor

    12-pin adaptor

  • 7-pin miniature adaptor

    7-pin miniature adaptor

  • 7-pin miniature adaptor

    7-pin miniature adaptor

Notes

  1. ↑ The original quote refers to the 575, however, the first curve tracer was the 570 in 1955; the 541 was released in 1955 as well, and the text continues to tell the 575 story. It follows that the instrument referenced is clearly the 570, not the 575, which was released in 1957.

Components

Some Parts Used in the 570

Part Part Number(s) Class Description Used in
12AT7 154-0039-00 Vacuum Tube (Dual Triode) dual high-gain triode 161 • 180 • 310 • 310A • 315 • 316 • 360 • 502 • 502A • 511A • 512 • 513 • 513D • 514 • 514AD • 514D • 516 • 524 • 529 • RM529 • 544 • 546 • 547 • 556 • 565 • 570 • 3A2 • 75 • 3A75 • 1M1 • A • B • C • G • H • K • L • ML • M • N • K • R • S • Z • Keithley 610B
12AU7 154-041 • 154-0041-00 • 154-0287-00 Vacuum Tube (Dual Triode) dual medium-μ triode 104 • 104A • 122 • 160 • 161 • 162 • 181 • 190 • 310 • 310A • 316 • 317 • 3C66 • 502 • 502A • 507 • 511A • 512 • 516 • 517 • 517A • 524 • 526 • 535 • 536 • 545 • 545A • 545B • 547 • 549 • 555 • 561 • 564 • 570 • 575 • 581 • 581A • 585 • 585A • C • D • E • N • Q • Hickok 1825
12AX7 154-043 • 154-0043-00 Vacuum Tube (Dual Triode) dual triode 3C66 • 513 • 524 • 531 • 531A • 535 • 536 • 545 • 545A • 545B • 546 • 547 • 549 • 555 • 570 • 581 • 581A • 585 • 585A • E • Q • Hickok 1825 • Keithley 610
12B4 154-044 • 154-0044-00 Vacuum Tube (Triode) power triode 126 • 310 • 310A • 316 • 317 • 502 • 502A • 524 • 526 • 541 • 541A • 535 • 535A • 545 • 545A • 546 • 547 • 570 • 549 • 551 • 555 • 513 • 581 • 581A • 585 • 585A • Keithley 610
12BZ7 154-048 • 154-0048-00 Vacuum Tube (Dual Triode) dual triode 524 • 570
154-0763-00 154-0763-00 • 154-0763-03 CRT 5" CRT 525 • 570 • 575
5642 154-0051-00 • 154-0079-00 Vacuum Tube (Diode) directly-heated high-voltage rectifier 310 • 310A • 316 • 317 • 360 • 453 • 502 • 502A • 503 • 504 • 506 • 513 • 515 • 516 • 524 • 529 • RM529 • 533 • 533A • 535 • 536 • 543 • 543A • 543B • 545 • 545A • 545B • 547 • 551 • 555 • 556 • 560 • 561 • 561A • 561S • 564 • 567 • 570 • 575 • 581 • 581A • 585 • 585A • 647 • 647A
5651 154-052 • 154-0052-00 • 154-0288-00 Gas Discharge Tube (Voltage regulator) 87 V voltage reference 128 • 160 • 310 • 310A • 502 • 503 • 504 • 511A • 512 • 516 • 517 • 524 • 526 • 531 • 531A • 535 • 536 • 541 • 541A • 543 • 543A • 543B • 545 • 545A • 545B • 570 • 549 • 581 • 581A • 585 • 585A
6AL5 154-016 • 154-0016-00 • 154-0038-00 Vacuum Tube (Dual Diode) high-perveance dual diode 163 • 181 • 190 • 1M1 • 310 • 310A • 315 • 316 • 317 • 3B1 • 3B1S • 3B2 • 3B3 • 3B5 • 502 • 502A • 503 • 511 • 511A • 512 • 516 • 517 • 517A • 524 • 526 • 535 • 535A • 545 • 545A • 549 • 551 • 565 • 570 • 581 • 581A • 585 • 585A • C • T • Telequipment D52 • Telequipment D56 • Telequipment S52
6AN8 154-078 • 154-0078-00 Vacuum Tube (Triode/Pentode) triode-pentode combo 310 • 310A • 316 • 317 • 360 • 502 • 502A • 516 • 517 • 517A • 526 • 565 • 570 • 575 • N
6AQ5 154-017 • 154-0017-00 Vacuum Tube (Pentode) beam pentode 310 • 310A • 316 • 360 • 507 • 511A • 512 • 517 • 517A • 524 • 536 • 570 • 575
6AU6 154-0022-00 • 157-0073-00 • 157-0059-00 • 154-0284-00 Vacuum Tube (Pentode) RF pentode 107 • 160 • 181 • 190 • 60 • 2A60 • 72 • 3A72 • 3C66 • 310 • 310A • 316 • 317 • 360 • 502 • 502A • 506 • 511 • 511A • 512 • 513 • 516 • 517 • 517A • 524 • 526 • 529 • RM529 • 531 • 531A • 535 • 536 • 545 • 545A • 546 • 547 • 549 • 555 • 561 • 561A • 561S • 564 • 565 • 567 • 570 • 575 • 581 • 581A • 585 • 585A • 80 • C • CA • Q
6AX4 154-113 • 154-0113-00 Vacuum Tube (Diode) diode 570
6AX5 154-023 • 154-0023-00 Vacuum Tube (Dual Rectifier) rectifier 570
6BQ7A 154-028 • 154-0028-00 • 157-0022-00 • 157-0003-00 Vacuum Tube (Dual Triode) dual triode 107 • 163 • 181 • 310 • 315 • 316 • 360 • 524 • 531 • 532 • 535 • 536 • 541 • 545 • 570 • T
6CD6GA 154-0112-00 Vacuum Tube (Pentode) 20 W beam-power pentode 570
6CL6 154-031 • 154-0031-00 • 154-0286-00 Vacuum Tube (Pentode) 7.5 W power pentode 132 • 310 • 310A • 316 • 317 • 515 • 524 • 525 • 531 • 535 • 535A • 545 • 545A • 545B • 549 • 570 • 581 • 581A • 585 • 585A • 3A74
6X4 154-035 • 154-0035-00 Vacuum Tube (Dual Rectifier) dual rectifier 128 • 130 • 181 • 511A • 512 • 517 • 517A • 570
T0520 154-0093-00 • 154-0097-00 • 154-0102-00 • 154-0103-00 • 154-0129-00 • 154-0162-00 • 154-0176-00 • 154-0343-00 CRT 5" CRT 525 • 532 • 570 • 575
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