475: Difference between revisions
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|manuals= | |manuals= | ||
'''475''' | '''475''' | ||
* [[Media:070-1333-00.pdf|Tektronix 475 Operators Manual]] (OCR, 14MB, good quality) | |||
* [[Media:070-1333-00.pdf|Tektronix 475 Operators Manual]] ( | * [[Media:070-1332-00.pdf|Tektronix 475 Service Manual]] (65MB, OK quality, needs re-OCR) | ||
* [[Media:070-1332-00.pdf|Tektronix 475 Service Manual]] ( | * [[Media:070-1862-00.pdf|Tektronix 475 with Option SN B250,000-up]] (165MB) | ||
* [[Media: | * [[Media:070-2039-00.pdf|Tektronix 475/DM44 Operators Manual]] (16MB) | ||
* [ | |||
* [ | * [[Media:tek_475_tek.pdf|Tektronix 475 Service Manual]] (65MB, OK quality) | ||
* [[Media:TB-9-6625-2240-35.pdf|475 calibration (Army)]] ( | * [[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]] | * [[Media:070-1739-01.pdf|475 and DM43/DM40 Instruction Manual]] | ||
'''475A''' | '''475A''' | ||
* [[Media:070-2163-00.pdf|Tektronix 475A-DM44 Oscilloscope Instruction Manual]] ( | * [[Media:070-2163-00.pdf|Tektronix 475A-DM44 Oscilloscope Instruction Manual]] (OCR) | ||
* [[Media:070-2162-00.pdf|Tektronix 475A Service Manual]] ( | * [[Media:070-2162-00.pdf|Tektronix 475A Service Manual]] (11MB) | ||
* [[Media:tek_475a_block_diagram.pdf|Tektronix 475A Schematics]] ( | * [[Media:tek_475a_block_diagram.pdf|Tektronix 475A Schematics]] (needs re-OCR) | ||
* [ | * [[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]] ( | * [[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]] | * [[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]] ( | * [[Media:tek_475a_msr.pdf|Tektronix 475A Marketing Sales Release]] (needs re-OCR) | ||
}} | }} | ||
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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 }} | ||
{{Spec | Rise time | 1.75 ns (475) }} | {{Spec | Rise time | 1.75 ns (475) }} | ||
{{Spec | Deflection | 2 mV/Div to 5 V/Div, | {{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, | {{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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* 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 | |||
* [[050-0674-00|Handle Replacement Modification Kit]] | * [[050-0674-00|Handle Replacement Modification Kit]] | ||
Revision as of 13:01, 12 October 2022
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
- Lazy Electrons Tektronix 475A & DM44 Repair Page
- The New Look in Portables, in Tekscope Vol. 4 No. 5, 1972
- Tek 475 / Tek 475A @ amplifier.cd
- Tek 475A / DM44 repair by vintageTek Museum @ YouTube
- Tek 475A in operation @ YouTube
- Tektronix 475A and DM44 Repair Power Supply and Logic by Zenwizard Studios @ YouTube
- Tektronix 475A and DM44 Power Supply and Tube Alignment @ Zenwizard Studios YouTube
- 151-0367-00 Guaranteed Bad Parts @ Zenwizard Studios YouTube
- Tektronix 475A Vertical Alignment and One Last Power Supply Issue @ Zenwizard Studios YouTube
- Tektronix 475A Trigger Section Alignment @ Zenwizard Studios YouTube
- Tektronix DM44 & 475A Horizontal Alignment by Zenwizard Studios @ YouTube
Common Problems
- See 475/Repairs
Pictures
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Tektronix 475A
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Tektronix 475A
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Tek 475 in mixed sweep ("MIX") horizontal mode
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475A with DM44
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475
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475 rear
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475A with DM44
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475
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475A rear
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475 (OS-261 C) rear, with DC-Input
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475A A9 Interface board
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475A A6 & Fan Motor
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475A A7 Timing board
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475A Power Supply Section of A9
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475A with DM44 Board on top
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475A A3 Vertical Preamp board
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475/DM44 measuring a 1 kHz sine wave
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475/DM44 measuring a 10 kHz sine wave
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475/DM44 measuring a 100 kHz sine wave
475M
Custom ICs used in the 475