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'''475'''
'''475'''
* [[Media:070-1333-00.pdf|Tektronix 475 Operators Manual]] (OCR, 14MB, good quality)
* [[Media:070-1333-00.pdf|Tektronix 475 Operators Manual]] (OCR, 14MB, good quality)
* [[Media:070-1332-00.pdf|Tektronix 475 Service Manual]] (65MB, OK quality, needs re-OCR)
* [[Media:070-1332-00.pdf|Tektronix 475 Service Manual]] (OCR)
* [[Media:Tek 475 corrections and changes.pdf|Tektronix 475 Service Manual Corrections and Changes]]
* [[Media:070-1862-00.pdf|Tektronix 475 with Option SN B250,000-up]] (165MB)
* [[Media:070-1862-00.pdf|Tektronix 475 with Option SN B250,000-up]] (165MB)
* [[Media:070-2039-00.pdf|Tektronix 475/DM44 Operators Manual]] (16MB)
* [[Media:070-2039-00.pdf|Tektronix 475/DM44 Operators Manual]] (16MB)
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'''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]] (needs OCR)
* [[Media:062-2784-00.pdf|067-0676-00 Vertical Insertion Unit for 475 Datasheet]]
* [[050-0674-00|Handle Replacement Modification Kit]]


'''History'''
'''History'''
* [[Media:Tek 465 and 475 marketing sales release.pdf|Tektronix 465 and 475 Marketing Sales Release]]
* [[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]] (needs re-OCR)
* [[Media:tek_475a_msr.pdf|Tektronix 475A Marketing Sales Release]]


}}
}}
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It is all solid-state except for the CRT.  It was introduced in November 1972.
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.
The military variant is called OS-261 C(v)1/0, which has a DC/DC converter (12/24 V input) on board.
 
The 475M is a standard 475 with enhanced environmental specs.  


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 ([[introduced in 1977]]), has 250 MHz bandwidth and a maximum vertical sensitivity of 5 mV/Div.
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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, SN B100000+ also 100 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; 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 }}
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{{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.), [[154-0677-00]]  }}
{{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}}
==Links==
===Documents and reports===
* [https://lazyelectrons.wordpress.com/2018/02/18/tektronix-475a-dm44-repair/ Lazy Electrons Tektronix 475A & DM44 Repair Page]
* [https://www.amplifier.cd/Test_Equipment/Tektronix/Tektronix_other/475.htm      Tek 475] / [https://www.amplifier.cd/Test_Equipment/Tektronix/Tektronix_other/475A_DM44.htm Tek 475A with DM44] @ amplifier.cd
{{Documents|Link=475}}
===Videos===
====Zenwizard Studios====
* [https://www.youtube.com/watch?v=gEXYRPNohyA Tektronix 475 151-0367-00 Guaranteed Bad Parts] ''caution - see notes on [[151-0367-00]] page''
* [https://www.youtube.com/watch?v=982GcYWIjWI Tektronix 475 non-A Repair and Restoration]
* [https://www.youtube.com/watch?v=KzVMbhytWOg Tektronix 475A and DM44 Power Supply and Tube Alignment]
* [https://www.youtube.com/watch?v=5fGnnTfDNPA Tektronix 475A and DM44 Horizontal Alignment]
* [https://www.youtube.com/watch?v=wfw60QmUp_A Tektronix 475A and DM44 Repair Power Supply and Logic]
* [https://www.youtube.com/watch?v=gtDnTN14JL0 Tektronix 475A Vertical Alignment and One Last Power Supply Issue]
* [https://www.youtube.com/watch?v=tw55DrUR8s8 Tektronix 475A Trigger Section Alignment]
====VintageTek Museum====
* [https://www.youtube.com/watch?v=WPgkVThknYo Tek 475A / DM44 repair]
====Miscellaneous====
* [https://www.youtube.com/watch?v=2SESaF7Ibbw Tek 475A in operation]


==Internals==
==Internals==
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[[155-0082-00]] vertical output amplifier, and [[155-0049-00]] sweep control.
[[155-0082-00]] vertical output amplifier, and [[155-0049-00]] sweep control.


==Links==
==Prices==
* [https://lazyelectrons.wordpress.com/2018/02/18/tektronix-475a-dm44-repair/ Lazy Electrons Tektronix 475A & DM44 Repair Page]
{| class="wikitable"
* 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
! Year
* [https://www.youtube.com/watch?v=2SESaF7Ibbw Tek 475A in operation] @ YouTube
! 1973
* [[050-0674-00|Handle Replacement Modification Kit]]
! 1976
! 1980
! 1980 (A)
! 1982 (A)
! 1983
|-
! Catalog Price
|align=right| $2,500
|align=right| $2,900
|align=right| $3,650
|align=right| $4,050
|align=right| $4,410
|
|-
! In 2023 Dollars
|align=right| $17,300
|align=right| $15,700
|align=right| $13,600
|align=right| $15,100
|align=right| $14,100
|
|}


==Common Problems==
==Common Problems==
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==Pictures==
==Pictures==
===475===
<gallery>
<gallery>
475A_1.JPG | Tektronix 475A
Tek 475 mix mode.jpg       | Tek 475 in mixed sweep ("MIX") horizontal mode
Tek 475a front.jpg | Tektronix 475A
Tek 475 square sin.jpg     | 475
Tek 475 mix mode.jpg|Tek 475 in mixed sweep ("MIX") horizontal mode
Tek 475 rear.jpg           | 475 rear
Tek 475a dm44 trace.jpg|475A with [[DM44]]
Tek 475 dual sine.jpg      | 475
Tek 475 square sin.jpg|475
Tek_OS_261_rear.jpg        | 475 (OS-261 C) rear, with DC-Input
Tek 475 rear.jpg|475 rear
Tek475DM44 1khz.jpg        | 475/DM44 measuring a 1 kHz sine wave
Tek 475a trace dm44.jpg|475A with [[DM44]]
Tek475DM44 10khz.jpg        | 475/DM44 measuring a 10 kHz sine wave
Tek 475 dual sine.jpg|475
Tek475DM44 100khz.jpg       | 475/DM44 measuring a 100 kHz sine wave
Tek_475A_Time-Freq.jpg | 475A Time/Frequency Measurement with [[DM44]], HP Frequency Counter used for Verifying [[DM44]] Output.
</gallery>
Tek 475a rear.jpg|475A rear
 
Tek_OS_261_rear.jpg | 475 (OS-261 C) rear, with DC-Input
===475A===
<gallery>
475A_1.JPG                  | Tektronix 475A
Tek 475a front.jpg          | Tektronix 475A
Tek 475a dm44 trace.jpg     | 475A with [[DM44]]
Tek 475a trace dm44.jpg     | 475A with [[DM44]]
Tek_475A_Time-Freq.jpg     | 475A Time/Frequency Measurement with [[DM44]], HP Frequency Counter used for Verifying [[DM44]] Output.
Tek 475a rear.jpg           | 475A rear
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
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 10khz.jpg | 475/DM44 measuring a 10 kHz sine wave
Tek475DM44 100khz.jpg | 475/DM44 measuring a 100 kHz sine wave
</gallery>
</gallery>
===475M===
===475M===
<gallery>
<gallery>
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</gallery>
</gallery>


{{Custom ICs|475}}
==Components==
{{Custom ICs|475A}}
{{Parts|475}}
{{Parts|475A}}
{{Parts|475M}}


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