475: Difference between revisions

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discontinued=1983 |
discontinued=1983 |
manuals=
manuals=
'''475'''
* [http://w140.com/tek_475_tek.pdf Tektronix 475 Manual (65MB file, ok quality, PDF)]
* [http://w140.com/tek_475_tek.pdf Tektronix 475 Manual (65MB file, ok quality, PDF)]
* [http://w140.com/Tektronix_475_Oscilloscope_Service_Manual.pdf Tektronix 475 Manual (108MB file, good quality, PDF)]
* [http://w140.com/Tektronix_475_Oscilloscope_Service_Manual.pdf Tektronix 475 Manual (108MB file, good quality, PDF)]
* [[Media:TB-9-6625-2240-35.pdf|475 calibration (Army) (OCR)]]
* [[Media:070-1332-00.pdf|Tektronix 475 Manual (65MB file, ok quality, PDF, OCR, bad-OCR)]]
* [[Media:475_DM44_op.pdf|Tektronix 475/DM44 Operators Manual (16MB file, PDF)]]
'''475A'''
* [[Media:070-2163-00.pdf|Tektronix 475A-DM44 Oscilloscope Instruction Manual (OCR, PDF)]]
* [[Media:070-2162-00.pdf|Tektronix 475A Manual (11MB, PDF)]]
* [[Media:tek_475a_block_diagram.pdf|Tektronix 475A Schematics (PDF, OCR, bad-OCR)]]
* [http://w140.com/tek_475a_schematics.pdf  Tektronix 475A Schematics (PDF)]
* [http://w140.com/tek_475a_schematics.pdf  Tektronix 475A Schematics (PDF)]
'''Modifications'''
* [[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)]]
'''History'''
* [[Media:Tek 465 and 475 marketing sales release.pdf|Tektronix 465 and 475 Marketing Sales Release (PDF)]]
* [[Media:tek_475a_msr.pdf|Tektronix 475A Marketing Sales Release (PDF, OCR, bad-OCR)]]
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* [http://w140.com/tek_475a_description.pdf Tektronix 475A Marketing Sales Release (PDF)]
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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.


''475A [[list of manuals that are needed|manual needed]] (no good quality free scan available)''
Military variant is called OS-261 C(v)1/0, which has DC/DC converter (12/24V input) on board.
}}
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.


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.
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 optional [[DM44]] multimeter attaches to the top of the instrument.
The optional [[DM44]] multimeter attaches to the top of the instrument.
Line 37: Line 60:


==Internals==
==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.
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==
==Links==
* [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]]
* 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=2SESaF7Ibbw Tek 475A in operation] @ YouTube
* [https://www.youtube.com/watch?v=2SESaF7Ibbw Tek 475A in operation] @ YouTube
* [[050-0674-00|Handle Replacement Modification Kit]]
==Common Problems==
* See [[475/Repairs]]


==Pictures==
==Pictures==
Line 52: Line 82:
Tek 475 square sin.jpg|475
Tek 475 square sin.jpg|475
Tek 475 rear.jpg|475 rear
Tek 475 rear.jpg|475 rear
Tek 475a trace dm44.jpg|475A with [[DM44]]
Tek 475 dual sine.jpg|475
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
Tek_OS_261_rear.jpg | 475 (OS-261 C) rear, with DC-Input
475A_A9-Interface_board.jpg | 475A A9 Interface Board
475A_A6_Fan_motor.jpg |475A A6 & Fan Motor
475A_A9-PowerSupply.jpg | 475A Power Supply Section of A9
475A_DMM44_Board.jpg | 475A with [[DM44]] Board on top
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>


[[Category:400 series scopes]]
[[Category:400 series scopes]]
[[Category:Specifications needed]]
[[Category:Manual needed]]

Revision as of 20:44, 15 May 2020

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.

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

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 optional DM44 multimeter attaches to the top of the instrument.

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.)
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