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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]]
* [[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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{{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==
==Links==
* [https://lazyelectrons.wordpress.com/2018/02/18/tektronix-475a-dm44-repair/ Lazy Electrons Tektronix 475A & DM44 Repair Page]  
* [https://lazyelectrons.wordpress.com/2018/02/18/tektronix-475a-dm44-repair/ Lazy Electrons Tektronix 475A & DM44 Repair Page]  
* The New Look in Portables, in [[Media:Tekscope 1972 V4 N5 Sep 1972.pdf|Tekscope Vol. 4 No. 5, 1972]]
* [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
* [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=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 (This might be bad advice)] @ 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
* [https://www.youtube.com/watch?v=QqPUm_IHIxI Tektronix 475A Power Supply and Scope Repair (With Soldering)] by Zenwizard Studios @ YouTube
* [https://www.youtube.com/watch?v=y4QsrUGeVfw Tektronix 475A Trigger Transistor Testing 151 0367 00] by Zenwizard Studios @ YouTube
{{Documents|Link=475}}
{{Documents|Link=475}}
{{PatentLinks|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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|-
|-
! Catalog Price
! Catalog Price
| $2,500
|align=right| $2,500
| $2,900
|align=right| $2,900
| $3,650
|align=right| $3,650
| $4,050
|align=right| $4,050
| $4,410
|align=right| $4,410
|
|
|-
|-
! In 2023 Dollars
! In 2023 Dollars
| $17,300
|align=right| $17,300
| $15,700
|align=right| $15,700
| $13,600
|align=right| $13,600
| $15,100
|align=right| $15,100
| $14,100
|align=right| $14,100
|
|
|}
|}
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==Pictures==
==Pictures==
===475===
<gallery>
<gallery>
Tek 475 mix mode.jpg        | Tek 475 in mixed sweep ("MIX") horizontal mode
Tek 475 mix mode.jpg        | Tek 475 in mixed sweep ("MIX") horizontal mode

Latest revision as of 03:48, 19 June 2024

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 (12/24 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.

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, SN B100000+ also 100 MHz
Rise time 1.75 ns (475)
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
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

Links

Documents Referencing 475

Document Class Title Authors Year Links
Tekscope 1972 V4 N5 Sep 1972.pdf Article The New Look in Portables 1972 465 • 475
Tekscope 1974 V6 N5.pdf Article Understanding oscilloscope trigger controls 1974 475 • 7B70

Patents that may apply to 475

Page Title Inventors Filing date Grant date Links
Patent US 3562464A Cam actuated switch having movable and fixed contacts on circuit board Howard Vollum • Willem H Verhoef • Tony Sprando 1968-10-07 1971-02-09 Cam switches • 2101 • 2701 • 2703 • 432 • 434 • 465 • 475 • 5A15N • 5A18N • 5A20N • 5A21N • 5A38 • 5A45 • 5B10N • 5B12N • 7A15 • 7A16A • 7A18 • 7A19 • 7A24 • 7A26 • 7B10 • 7B15 • 7B50 • 7B51 • 7B52 • 7B53A • 7B50A • 7B70 • 7B71 • 7B80 • 7B85 • 7B87 • 7B92 • 7B92A • 7D01 • 7D12 • 7D15 • 7J20 • 7S12 • 7T11 • 7T11A • AF501 • AM502 • AM503 • DC502 • DC503 • DC504 • DC505 • DM501 • DM502 • FG501 • FG501A • FG502 • FG503 • FG504 • FG507 • PG501 • PG502 • PG505 • PG506 • PG506A • PG508 • TG501 • SC502 • SC503 • SC504
Patent US 3725724A Deflection factor indicating apparatus Howard Vollum 1971-01-11 1973-04-03 464 • 465 • 475 • 5A14N • 5A26N • 5A48
Patent US 3719788A Switch having ganged contacts mounted on opposite sides of circuit board Ken Holland • Tony Sprando 1971-02-04 1973-03-06 465 • 475 • 5A38 • 5A45 • 7A15 • 7A16A • 7A18 • 7A19 • 7A24 • 7A26 • 7D15 • PG506
Patent US 3753170A Step attenuator apparatus having attenuator stages selectively connected in cascade by cam actuated switches Ken Holland 1971-02-10 1973-08-14 465 • 475 • 5A38 • 5A45 • 7A15 • 7A16A • 7A18 • 7A19 • 7A24 • 7A26
Patent US 3900711A Electrical contactor assembly for high frequency applications Ken Holland 1974-02-04 1975-08-19 465 • 475 • 5A38 • 5A45 • 7A15 • 7A16A • 7A18 • 7A19 • 7A24 • 7A26 • 7D15 • AM503

Videos

Zenwizard Studios

VintageTek Museum

Miscellaneous

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.

Prices

Year 1973 1976 1980 1980 (A) 1982 (A) 1983
Catalog Price $2,500 $2,900 $3,650 $4,050 $4,410
In 2023 Dollars $17,300 $15,700 $13,600 $15,100 $14,100

Common Problems

Pictures

475

  • Tek 475 in mixed sweep ("MIX") horizontal mode

    Tek 475 in mixed sweep ("MIX") horizontal mode

  • 475

    475

  • 475 rear

    475 rear

  • 475

    475

  • 475 (OS-261 C) rear, with DC-Input

    475 (OS-261 C) rear, with DC-Input

  • 475/DM44 measuring a 1 kHz sine wave

    475/DM44 measuring a 1 kHz sine wave

  • 475/DM44 measuring a 10 kHz sine wave

    475/DM44 measuring a 10 kHz sine wave

  • 475/DM44 measuring a 100 kHz sine wave

    475/DM44 measuring a 100 kHz sine wave

475A

  • Tektronix 475A

    Tektronix 475A

  • Tektronix 475A

    Tektronix 475A

  • 475A with DM44

    475A with DM44

  • 475A with DM44

    475A with DM44

  • 475A Time/Frequency Measurement with DM44, HP Frequency Counter used for Verifying DM44 Output.

    475A Time/Frequency Measurement with DM44, HP Frequency Counter used for Verifying DM44 Output.

  • 475A rear

    475A rear

  • 475A A9 Interface board

    475A A9 Interface board

  • 475A A6 & Fan Motor

    475A A6 & Fan Motor

  • 475A A7 Timing board

    475A A7 Timing board

  • 475A Power Supply Section of A9

    475A Power Supply Section of A9

  • 475A with DM44 Board on top

    475A with DM44 Board on top

  • 475A A3 Vertical Preamp board

    475A A3 Vertical Preamp board

475M

Components

Some Parts Used in the 475

Part Part Number(s) Class Description Used in
120-0799-01 120-0799-01 Discrete component power transformer 475
151-0261-00 151-0261-00 Discrete component dual PNP transistor AM501 • AM502 • CG5001 • CG551AP • FG501 • FG502 • FG503 • OF150 • OF151 • OF152 • OF235 • OS261 • RM502A • R1140 • R5030 • R5031 • R7912 • 067-0679-00 • 067-0807-00 • 1101 • 1140A • 1141 • 1142 • 1350 • 145 • 1450 • 1480 • 1481 • 1482 • 1485 • 1501 • 1801 • 1900 • 1910 • 1980 • 213 • 26A1 • 26A2 • 2620 • 285 • 3A9 • 3A10 • 3S1 • 3S2 • 3S5 • 3S6 • 432 • 434 • 4501 • 454 • 4601 • 4602 • 4610 • 4612 • 4620 • 4632 • 4634 • 4701 • 475 • 492 • 492A • 492AP • 494 • 494P • 496 • 496P • 5A13N • 5A20N • 5A21N • 5A22N • 5A26 • 5L4N • 502A • 5030 • 5031 • 576 • 690SR • 7A22 • 7A29 • 7B51 • 7B71 • 7J20 • 7L5 • 7S11 • 7S12 • 7912AD
154-0677-xx 154-0677-00 • 154-0677-10 • 154-0677-14 CRT CRT 475 • 475A
155-0032-00 155-0032-00 • 155-0032-01 Monolithic integrated circuit variable-gain transconductance amplifier (voltage in, current out) 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
155-0049-00 155-0049-00 • 155-0049-01 • 155-0049-02 Monolithic integrated circuit sweep control with lockout 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
155-0078-00 155-0078-xx • 155-0273-00 • 155-0274-00 Monolithic integrated circuit broadband amplifier 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 Monolithic integrated circuit vertical output amplifier 475 • 475A
155-0085-00 155-0085-00 • 155-0085-01 Hybrid integrated circuit input amplifier 475 • 475A • 475M
155-0091-00 155-0091-00 Monolithic integrated circuit channel switch / HF amplifier 475 • 475A • 475M
155-0217-00 155-0216-00 • 155-0217-00 Monolithic integrated circuit variable-gain transconductance amplifier 335 • 475 • 7D20 • FG504
SKA6516 151-0367-00 Discrete component NPN Transistor 465 • 465B • 466 • 475
SMTD995 152-0140-01 Discrete component 10 mA, 8 pF tunnel diode 1S1 • 1S2 • 1502 • 21A • 22A • 3T5 • 3T6 • 475 • 475A • 475M • 544 • R544 • 546 • RM546 • 547 • RM547 • 556 • R556 • 581A • 585A • RM585 • 7B52 • 7B53N • 7B70 • 7B71 • 7D10 • 7D11 • 7T11 • 7T11A • R7912 • S-51 • S-52 • TU-5 • 067-0572-00 • 067-0572-01 • 067-0681-00
STD927 152-0386-00 Discrete component 10 mA, 25 pF tunnel diode 475 • 7B50 • 7B51


Some Parts Used in the 475A

Part Part Number(s) Class Description Used in
154-0677-xx 154-0677-00 • 154-0677-10 • 154-0677-14 CRT CRT 475 • 475A
155-0032-00 155-0032-00 • 155-0032-01 Monolithic integrated circuit variable-gain transconductance amplifier (voltage in, current out) 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
155-0049-00 155-0049-00 • 155-0049-01 • 155-0049-02 Monolithic integrated circuit sweep control with lockout 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
155-0078-00 155-0078-xx • 155-0273-00 • 155-0274-00 Monolithic integrated circuit broadband amplifier 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 Monolithic integrated circuit vertical output amplifier 475 • 475A
155-0085-00 155-0085-00 • 155-0085-01 Hybrid integrated circuit input amplifier 475 • 475A • 475M
155-0091-00 155-0091-00 Monolithic integrated circuit channel switch / HF amplifier 475 • 475A • 475M
155-0168-00 155-0168-00 Hybrid integrated circuit amplifier 475A
SMTD995 152-0140-01 Discrete component 10 mA, 8 pF tunnel diode 1S1 • 1S2 • 1502 • 21A • 22A • 3T5 • 3T6 • 475 • 475A • 475M • 544 • R544 • 546 • RM546 • 547 • RM547 • 556 • R556 • 581A • 585A • RM585 • 7B52 • 7B53N • 7B70 • 7B71 • 7D10 • 7D11 • 7T11 • 7T11A • R7912 • S-51 • S-52 • TU-5 • 067-0572-00 • 067-0572-01 • 067-0681-00


Some Parts Used in the 475M

Part Part Number(s) Class Description Used in
155-0032-00 155-0032-00 • 155-0032-01 Monolithic integrated circuit variable-gain transconductance amplifier (voltage in, current out) 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
155-0049-00 155-0049-00 • 155-0049-01 • 155-0049-02 Monolithic integrated circuit sweep control with lockout 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
155-0078-00 155-0078-xx • 155-0273-00 • 155-0274-00 Monolithic integrated circuit broadband amplifier 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
155-0085-00 155-0085-00 • 155-0085-01 Hybrid integrated circuit input amplifier 475 • 475A • 475M
155-0091-00 155-0091-00 Monolithic integrated circuit channel switch / HF amplifier 475 • 475A • 475M
SMTD995 152-0140-01 Discrete component 10 mA, 8 pF tunnel diode 1S1 • 1S2 • 1502 • 21A • 22A • 3T5 • 3T6 • 475 • 475A • 475M • 544 • R544 • 546 • RM546 • 547 • RM547 • 556 • R556 • 581A • 585A • RM585 • 7B52 • 7B53N • 7B70 • 7B71 • 7D10 • 7D11 • 7T11 • 7T11A • R7912 • S-51 • S-52 • TU-5 • 067-0572-00 • 067-0572-01 • 067-0681-00
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