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{{Oscilloscope Sidebar |
{{Oscilloscope Sidebar  
title=Tektronix 475 |
|manufacturer=Tektronix
summary=Portable 200 MHz dual-trace scope |
|series=400-series scopes
image=Tek 475 square sin.jpg |
|model=475
caption= Tektronix 475 |
|summary=Portable 200 MHz dual-trace scope
introduced=1972 |
|image=Tek 475 square sin.jpg
discontinued=1983 |
|caption= Tektronix 475  
manuals=
|introduced=1972  
|discontinued=1983  
|designers=Leon Orchard;Luis Navarro;Bob Shand;Jim Hinze;Jim Godwin;Les Larson;Steve Tosh;Jim Woo;Ken Holland;Bill Mark;George Ermini;Dennis Braatz
|manuals=
'''475'''
'''475'''
* [http://w140.com/tek_475_tek.pdf Tektronix 475 Manual (65MB file, ok quality, PDF)]
* [[Media:070-1333-00.pdf|Tektronix 475 Operators Manual]] (OCR, 14MB, good quality)
* [http://w140.com/Tektronix_475_Oscilloscope_Service_Manual.pdf Tektronix 475 Manual (108MB file, good quality, PDF)]
* [[Media:070-1332-00.pdf|Tektronix 475 Service Manual]] (65MB, OK quality, needs re-OCR)
* [[Media:TB-9-6625-2240-35.pdf|475 calibration (Army) (OCR)]]
* [[Media:070-1862-00.pdf|Tektronix 475 with Option SN B250,000-up]] (165MB)
* [[Media:070-1332-00.pdf|Tektronix 475 Manual (65MB file, ok quality, PDF, OCR, bad-OCR)]]
* [[Media:070-2039-00.pdf|Tektronix 475/DM44 Operators Manual]] (16MB)
 
* [[Media:tek_475_tek.pdf|Tektronix 475 Service Manual]] (65MB, OK quality)
* [[Media:Tektronix_475_Oscilloscope_Service_Manual.pdf|Tektronix 475 Service Manual]] (108MB, good quality)
 
* [[Media:TB-9-6625-2240-35.pdf|475 calibration (Army)]] (OCR)
* [[Media:070-1739-01.pdf|475 and DM43/DM40 Instruction Manual]]


'''475A'''
'''475A'''
* [[Media:070-2163-00.pdf|Tektronix 475A-DM44 Oscilloscope Instruction Manual (OCR, PDF)]]
* [[Media:070-2163-00.pdf|Tektronix 475A-DM44 Oscilloscope Instruction Manual]] (OCR)
* [[Media:070-2162-00.pdf|Tektronix 475A Manual (11MB, PDF)]]
* [[Media:070-2162-00.pdf|Tektronix 475A Service Manual]] (11MB)
* [[Media:tek_475a_block_diagram.pdf|Tektronix 475A Schematics (PDF, OCR, bad-OCR)]]
* [[Media:tek_475a_block_diagram.pdf|Tektronix 475A Schematics]] (needs re-OCR)
* [http://w140.com/tek_475a_schematics.pdf Tektronix 475A Schematics (PDF)]
* [[Media:tek_475a_schematics.pdf|Tektronix 475A Schematics]]


'''Modifications'''
'''Modifications'''
* [[Media:050-1558-00.pdf|Modification: U3165 Replacement]]
* [[Media:050-1558-00.pdf|Modification: U3165 Replacement]]
* [[Media:062-2784-00.pdf|067-0676-00 Vertical Insertion Unit for 475 Datasheet (PDF, needs OCR)]]
* [[Media:062-2784-00.pdf|067-0676-00 Vertical Insertion Unit for 475 Datasheet]] (needs OCR)


'''History'''
'''History'''
* [[Media:Tek 465 and 475 marketing sales release.pdf|Tektronix 465 and 475 Marketing Sales Release (PDF)]]
* [[Media:Tek 465 and 475 marketing sales release.pdf|Tektronix 465 and 475 Marketing Sales Release]]
* [[Media:tek_475a_msr.pdf|Tektronix 475A Marketing Sales Release (PDF, OCR, bad-OCR)]]
* [[Media:tek_475a_msr.pdf|Tektronix 475A Marketing Sales Release]] (needs re-OCR)
<!--
 
* [http://w140.com/tek_475a_description.pdf Tektronix 475A Marketing Sales Release (PDF)]
-->
}}
}}
The '''Tektronix 475''' is a portable dual-trace oscilloscope with dual time-bases similar to the [[465]],
The '''Tektronix 475''' is a portable dual-trace oscilloscope with dual time-bases similar to the [[465]],
but with 200 MHz bandwidth and a maximum vertical sensitivity of 2 mV/Div.
but with 200 MHz bandwidth and a maximum vertical sensitivity of 2 mV/Div.
It is all solid-state except for the CRT.  
It is all solid-state except for the CRT. It was introduced in November 1972.
It was introduced in November 1972.


Military variant is called OS-261 C(v)1/0, which has DC/DC converter (12/24V input) on board.
The military variant is called OS-261 C(v)1/0, which has a DC/DC converter (12/24V input) on board.
 
A revised version, the 475A ([[introduced in 1977]]), has 250 MHz bandwidth and a maximum vertical sensitivity of 5 mV/Div.


A revised version, the 475A, has 250 MHz bandwidth and a maximum vertical sensitivity of 5 mV/Div.
The [[1106]] is a battery pack for the 475.
The [[1106]] is a battery pack for the 475.


The optional [[DM44]] multimeter attaches to the top of the instrument.
The optional [[DM44]] multimeter attaches to the top of the instrument.
From [[Media:Tekscope 1972 V4 N5 Sep 1972.pdf|Tekscope Vol. 4 No. 5, 1972]]:
<blockquote>
Electrical design team [...] for the 475 under the leadership of [[Jim Hinze]] was: [[Jim Godwin]], [[Les Larson]], [[Steve Tosh]], and [[Jim Woo]].
</blockquote>


{{BeginSpecs}}
{{BeginSpecs}}
{{Spec | Bandwidth | 200 MHz (475), AC cutoff 10 Hz, switchable BW limit 20 MHz }}
{{Spec | Bandwidth | 200 MHz (475), AC cutoff 10 Hz, switchable BW limit 20 MHz }}
{{Spec | Rise time | 1.75  ns (475) }}
{{Spec | Rise time | 1.75  ns (475) }}
{{Spec | Deflection | 2 mV/Div to 5 V/Div, 1-2-5 }}
{{Spec | Deflection | 2 mV/Div to 5 V/Div, 1−2−5 }}
{{Spec | Cascaded mode | 400 μV/Div, 50 MHz with CH1 input connected to CH2 VERT SIG OUT }}
{{Spec | Cascaded mode | 400 μV/Div, 50 MHz with CH1 input connected to CH2 VERT SIG OUT }}
{{Spec | Time base | 10 ns/Div to 500 ms/Div, 1-2-5, and ×10 magnifier }}
{{Spec | Time base | 10 ns/Div to 500 ms/Div, 1−2−5, and ×10 magnifier }}
{{Spec | Input impedance | 1 MΩ // 20 pF }}
{{Spec | Input impedance | 1 MΩ // 20 pF }}
{{Spec | Triggering | 0.3 Div (int) or 50 mV (ext) to 40 MHz, increasing to 1.5 Div/250 mV at 200 MHz; AC coupling >60 Hz; LF REJ >50 kHz, HF REJ <50 kHz }}
{{Spec | Triggering | 0.3 Div (int) or 50 mV (ext) to 40 MHz, increasing to 1.5 Div/250 mV at 200 MHz; AC coupling >60 Hz; LF REJ >50 kHz, HF REJ <50 kHz }}
Line 54: Line 66:
{{Spec | Calibrator | 1 kHz, 30 mA / 300 mV square wave }}
{{Spec | Calibrator | 1 kHz, 30 mA / 300 mV square wave }}
{{Spec | Outputs | CH2 Vert Signal Out, 20 mV/Div into 1 MΩ or 10 mV/Div into 50 Ω; A and B +GATE OUT, +5 V; [[LEMO S-series connector|Probe power jack]] }}
{{Spec | Outputs | CH2 Vert Signal Out, 20 mV/Div into 1 MΩ or 10 mV/Div into 50 Ω; A and B +GATE OUT, +5 V; [[LEMO S-series connector|Probe power jack]] }}
{{Spec | CRT | 8 × 10 cm², P31 phosphor (P11 opt.)  }}
{{Spec | CRT | 8 × 10 cm², P31 phosphor (P11 opt.), [[154-0677-00]] }}
{{Spec | Power | 110, 115, 120, 220, 230 or 240  V<sub>AC</sub> ±10%, 48-440 Hz, max. 100 W }}
{{Spec | Power | 110, 115, 120, 220, 230 or 240  V<sub>AC</sub> ±10%, 48-440 Hz, max. 100 W }}
{{EndSpecs}}
{{EndSpecs}}
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* The New Look in Portables, in [[Media:Tekscope 1972 V4 N5 Sep 1972.pdf|Tekscope Vol. 4 No. 5, 1972]]
* The New Look in Portables, in [[Media:Tekscope 1972 V4 N5 Sep 1972.pdf|Tekscope Vol. 4 No. 5, 1972]]
* [http://www.amplifier.cd/Test_Equipment/Tektronix/Tektronix_other/475.htm Tek 475] / [http://www.amplifier.cd/Test_Equipment/Tektronix/Tektronix_other/475A_DM44.htm Tek 475A] @ amplifier.cd
* [http://www.amplifier.cd/Test_Equipment/Tektronix/Tektronix_other/475.htm Tek 475] / [http://www.amplifier.cd/Test_Equipment/Tektronix/Tektronix_other/475A_DM44.htm Tek 475A] @ amplifier.cd
* [https://www.youtube.com/watch?v=WPgkVThknYo Tek 475A / DM44 repair] by vintageTek Museum @ YouTube
* [https://www.youtube.com/watch?v=2SESaF7Ibbw Tek 475A in operation] @ YouTube
* [https://www.youtube.com/watch?v=2SESaF7Ibbw Tek 475A in operation] @ YouTube
* [https://www.youtube.com/watch?v=wfw60QmUp_A Tektronix 475A and DM44 Repair Power Supply and Logic] by Zenwizard Studios @ YouTube
* [https://www.youtube.com/watch?v=KzVMbhytWOg Tektronix 475A and DM44 Power Supply and Tube Alignment] @ Zenwizard Studios YouTube
* [https://www.youtube.com/watch?v=gEXYRPNohyA 151-0367-00 Guaranteed Bad Parts] @ Zenwizard Studios YouTube
* [https://www.youtube.com/watch?v=gtDnTN14JL0 Tektronix 475A Vertical Alignment and One Last Power Supply Issue] @ Zenwizard Studios YouTube
* [https://www.youtube.com/watch?v=tw55DrUR8s8 Tektronix 475A Trigger Section Alignment] @ Zenwizard Studios YouTube
* [https://www.youtube.com/watch?v=5fGnnTfDNPA Tektronix DM44 & 475A Horizontal Alignment] by Zenwizard Studios @ YouTube
* [https://www.youtube.com/watch?v=982GcYWIjWI Tektronix 475 non A Repair and Restoration] by Zenwizard Studios @ YouTube
* [[050-0674-00|Handle Replacement Modification Kit]]
* [[050-0674-00|Handle Replacement Modification Kit]]


Line 86: Line 108:
Tek 475a rear.jpg|475A rear
Tek 475a rear.jpg|475A rear
Tek_OS_261_rear.jpg | 475 (OS-261 C) rear, with DC-Input
Tek_OS_261_rear.jpg | 475 (OS-261 C) rear, with DC-Input
475A_A9-Interface_board.jpg | 475A A9 Interface Board
475A_A9-Interface_board.jpg | 475A A9 Interface board
475A_A6_Fan_motor.jpg |475A A6 & Fan Motor  
475A_A6_Fan_motor.jpg |475A A6 & Fan Motor  
Tek_475A_A7Board.jpeg |475A A7 Timing board
475A_A9-PowerSupply.jpg | 475A Power Supply Section of A9
475A_A9-PowerSupply.jpg | 475A Power Supply Section of A9
475A_DMM44_Board.jpg | 475A with [[DM44]] Board on top
475A_DMM44_Board.jpg | 475A with [[DM44]] Board on top
475A_A3-Vertical_Preamp.jpg | 475A A3 Vertical Preamp Board
475A_A3-Vertical_Preamp.jpg | 475A A3 Vertical Preamp board
Tek475DM44 1khz.jpg | 475/DM44 measuring a 1 kHz sine wave
Tek475DM44 1khz.jpg | 475/DM44 measuring a 1 kHz sine wave
Tek475DM44 10khz.jpg | 475/DM44 measuring a 10 kHz sine wave
Tek475DM44 10khz.jpg | 475/DM44 measuring a 10 kHz sine wave
Tek475DM44 100khz.jpg | 475/DM44 measuring a 100 kHz sine wave
Tek475DM44 100khz.jpg | 475/DM44 measuring a 100 kHz sine wave
</gallery>
</gallery>
===475M===
<gallery>
Tek 475m 1.jpg
Tek 475m 2.jpg
Tek 475m 3.jpg
Tek 475m 4.jpg
Tek 475m 5.jpg
Tek 475m 6.jpg
Tek 475m 7.jpg
</gallery>
{{Custom ICs|475}}
{{Custom ICs|475A}}


[[Category:400 series scopes]]
[[Category:400 series scopes]]

Revision as of 12:17, 7 April 2023

Tektronix 475
Portable 200 MHz dual-trace scope
Tektronix 475

Produced from 1972 to 1983

Manuals

475

475A

Modifications

History

(All manuals in PDF format unless noted otherwise)
Manuals – Specifications – Links – Pictures

The Tektronix 475 is a portable dual-trace oscilloscope with dual time-bases similar to the 465, but with 200 MHz bandwidth and a maximum vertical sensitivity of 2 mV/Div. It is all solid-state except for the CRT. It was introduced in November 1972.

The military variant is called OS-261 C(v)1/0, which has a DC/DC converter (12/24V input) on board.

A revised version, the 475A (introduced in 1977), has 250 MHz bandwidth and a maximum vertical sensitivity of 5 mV/Div.

The 1106 is a battery pack for the 475.

The optional DM44 multimeter attaches to the top of the instrument.

From Tekscope Vol. 4 No. 5, 1972:

Electrical design team [...] for the 475 under the leadership of Jim Hinze was: Jim Godwin, Les Larson, Steve Tosh, and Jim Woo.

Key Specifications

Bandwidth 200 MHz (475), AC cutoff 10 Hz, switchable BW limit 20 MHz
Rise time 1.75  ns (475)
Deflection 2 mV/Div to 5 V/Div, 1−2−5
Cascaded mode 400 μV/Div, 50 MHz with CH1 input connected to CH2 VERT SIG OUT
Time base 10 ns/Div to 500 ms/Div, 1−2−5, and ×10 magnifier
Input impedance 1 MΩ // 20 pF
Triggering 0.3 Div (int) or 50 mV (ext) to 40 MHz, increasing to 1.5 Div/250 mV at 200 MHz; AC coupling >60 Hz; LF REJ >50 kHz, HF REJ <50 kHz
X bandwidth 3 MHz
Z axis input 5 Vp-p, 50 MHz
Calibrator 1 kHz, 30 mA / 300 mV square wave
Outputs CH2 Vert Signal Out, 20 mV/Div into 1 MΩ or 10 mV/Div into 50 Ω; A and B +GATE OUT, +5 V; Probe power jack
CRT 8 × 10 cm², P31 phosphor (P11 opt.), 154-0677-00
Power 110, 115, 120, 220, 230 or 240  VAC ±10%, 48-440 Hz, max. 100 W

Internals

The 475 uses a number of Tek-made integrated circuits, including the 155-0032-01 input preamplifier, 155-0085-00 input amplifier, 155-0078-00 vertical amplifier, 155-0091-00 channel switch, 155-0082-00 vertical output amplifier, and 155-0049-00 sweep control.

Links


Common Problems

Pictures

475M

Custom ICs used in the 475

Page Model Part nos Description Designers Used in
155-0032-00 M55 155-0032-00 155-0032-01 variable-gain transconductance amplifier Roy Hayes Einar Traa 335 464 465 465B 466 475 475A 475M 634 650 651 652 653 655 656 670 671 7A12 475 FG504 1440 1460 1480 1481 1482 1485
155-0049-00 M079G 155-0049-00 155-0049-01 155-0049-02 sweep control with lockout Bill DeVey 335 464 465 466 475 475A 475M 485 5B31 5B40 5B52 5B42 5B44 7B53A 7B80 7B85 7B87 7B92A 7B90P 7B10 7B15 SC502 7B42N AN/USM-281C 067-0657-00
155-0078-00 M084 155-0078-xx 155-0273-00 155-0274-00 broadband amplifier John Addis 464 465 466 468 475 475A 475M 485 7834 7844 7854 7904 R7903 R7912 7912AD 7912HB 7104 7A16A 7A16P 7A24 7A26 7A42 067-0587-01 067-0680-00 AM503 PG502 PG508 DC510 DC5010 FG5010
155-0082-00 155-0082-00 155-0082-00 vertical output amplifier 475 475A
155-0085-00 H136 155-0085-00 155-0085-01 input amplifier 475 475A 475M
155-0091-00 M095A 155-0091-00 channel switch / HF amplifier Einar Traa Jim Woo 475 475A 475M
155-0217-00 M55D 155-0216-00 155-0217-00 variable-gain transconductance amplifier Roy Hayes Einar Traa 335 475 7D20 FG504

Custom ICs used in the 475A

Page Model Part nos Description Designers Used in
155-0032-00 M55 155-0032-00 155-0032-01 variable-gain transconductance amplifier Roy Hayes Einar Traa 335 464 465 465B 466 475 475A 475M 634 650 651 652 653 655 656 670 671 7A12 475 FG504 1440 1460 1480 1481 1482 1485
155-0049-00 M079G 155-0049-00 155-0049-01 155-0049-02 sweep control with lockout Bill DeVey 335 464 465 466 475 475A 475M 485 5B31 5B40 5B52 5B42 5B44 7B53A 7B80 7B85 7B87 7B92A 7B90P 7B10 7B15 SC502 7B42N AN/USM-281C 067-0657-00
155-0078-00 M084 155-0078-xx 155-0273-00 155-0274-00 broadband amplifier John Addis 464 465 466 468 475 475A 475M 485 7834 7844 7854 7904 R7903 R7912 7912AD 7912HB 7104 7A16A 7A16P 7A24 7A26 7A42 067-0587-01 067-0680-00 AM503 PG502 PG508 DC510 DC5010 FG5010
155-0082-00 155-0082-00 155-0082-00 vertical output amplifier 475 475A
155-0085-00 H136 155-0085-00 155-0085-01 input amplifier 475 475A 475M
155-0091-00 M095A 155-0091-00 channel switch / HF amplifier Einar Traa Jim Woo 475 475A 475M
155-0168-00 H126 155-0168-00 amplifier Einar Traa 475A