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{{Oscilloscope Sidebar |
{{Oscilloscope Sidebar
title=Tektronix 422 |
|manufacturer=Tektronix
summary=15 MHz portable dual-trace scope |
|series=400-series scopes
image=Tek 422 front.jpg |
|model=422
caption=Tektronix 422 front |
|summary=15 MHz portable dual-trace scope
introduced=1966 |
|image=Tek_222_wtrace.jpeg
discontinued=1975 |
|caption=Tektronix 422 front
manuals=
|introduced=1965
* [http://w140.com/tek_422.pdf Tektronix 422 Manual (PDF)]
|discontinued=1975
* [http://w140.com/tek_422_ac_powersupply.pdf Tektronix 422 Manual, AC power supply (PDF)]
|designers=
* [http://exodus.poly.edu/~kurt/mmm/tek-422.pdf Tektronix 422 Manual with AC/DC Power Supply (PDF)]
|manuals=
* [http://w140.com/tek_422_low_sn.djvu Tektronix 422 Manual (low sn, DjVu)]
* [[Media:070-0434-02.pdf                  | Tektronix 422 Manual 070-0434-02]] (low quality scan)
* [http://w140.com/tek_422_sn_20000_up.pdf Tektronix 422 Manual for Serial Numbers 20,000 and up (PDF)]
* [[Media:070-0471-01.pdf                  | Tektronix 422 Manual 070-0471-01, AC/DC power supply]]
* [http://w140.com/tek_422_product_reference_book.pdf Tektronix 422 Product Reference Book (PDF)]
* [[Media:070-0528-00.pdf                  | Tektronix 422 Manual 070-0528-00, AC power supply]]
* [[Media:070-0895-00.pdf                  | Tektronix 422 Manual for Serial Numbers 20,000 and up]]
* [https://w140.com/tek_422_low_sn.djvu      Tektronix 422 Manual] (low sn, DjVu)
* [[Media:tek_422_prb.pdf                  | Tektronix 422 Product Reference Book]]
* [[Media:Tek 422 lecture notes.pdf        | Tektronix 422 Lecture Notes]]
* [[Media:Tek 422 acps fcp june 1969.pdf  | 422 ACPS FCP Jun 1969]]
* [[Media:Tek 422 fcp april 1969.pdf      | 422 FCP Apr 1969]]
* [[Media:Tek 422 cal notes.pdf            | 422 Cal Notes]]
* [[Media:070-0549-00.pdf                  | Installation Instructions for Tek 422 Battery Pack]]
<!--
* [https://w140.com/tek_422.pdf                         Tektronix 422 Manual (PDF, low quality scan)]
* [https://w140.com/tek_422_ac_powersupply.pdf         Tektronix 422 Manual, AC power supply (PDF)]
* [https://w140.com/mmm/tek-422.pdf                     Tektronix 422 Manual with AC/DC Power Supply (PDF)]
* [https://w140.com/tek_422_sn_20000_up.pdf             Tektronix 422 Manual for Serial Numbers 20,000 and up (PDF)]
* [https://w140.com/tek_422_product_reference_book.pdf Tektronix 422 Product Reference Book (PDF)]
-->
}}
}}
The '''Tektronix Type 422''' is a 15 MHz portable dual-trace oscilloscope introduced in 1966.   
The '''Tektronix Type 422''' is a 15 MHz portable dual-trace oscilloscope introduced in 1966.   
It was available with an optional battery back for operation without mains power.   
It was available with an optional battery back for operation without mains power.   
{{BeginSpecs}}
{{Spec | Bandwidth | DC to 15 MHz}}
{{Spec | Risetime | < 23 ns }}
{{Spec | Sweep | 500 ns/div to 0.5 s/div}}
{{Spec | Input impedance | 1 MΩ ±2% // 30 pF }}
{{Spec | Delay line | 150 ns, internal delay line}}
{{Spec | Input voltage | Max. 300 V combined DC and peak AC }}
{{Spec | Trigger source | CH1 & CH2, CH1, External }}
{{Spec | Channel isolation | 100:1 at 40 KHz }}
{{Spec | Calibrator  | ~1 kHz ±20%, 2 V ext jack, 0.2 V internal, square wave}}
{{Spec | CRT | [[T4220]] tube, P31 [[phosphor]], 6 kV acceleration (Post-def 4.9 kV), 8 × 10  graticule, 0.8 cm/div }}
{{Spec | Operating temperature | –15 °C to +55 °C  }}
{{Spec | Power | AC PS, 110/115/125 or 210/230/250 V<sub>AC</sub> ±10%, 45 Hz to 440 Hz, 40 W<br />AC-DC PS, 92–137 or 184–274 V<sub>AC</sub>, 45 Hz to 440 Hz, 11.5–35 V DC, 30 W}}
{{Spec | Dimensions | AC PS (H/W/D) 6.75/10.0/17.8 inches, AC-DC PS (H/W/D) 6.75/10.0/20.7 inches    }}
{{EndSpecs}}


==Specifications==
==Links==
[[Category:Specifications needed]] ''please add''
{{Documents|Link=422}}
 
* [https://youtu.be/rl-1BQyiaLk LazyElectrons Video on 422]
The post-deflection acceleration voltage is 4900 V.


==Internals==
==Internals==
Line 37: Line 66:
high-voltage state, it produces a current pulse in the primary of transformer T401, which produces
high-voltage state, it produces a current pulse in the primary of transformer T401, which produces
a current pulse in the secondary of T401.  The secondary of T401 feeds another tunnel diode,  
a current pulse in the secondary of T401.  The secondary of T401 feeds another tunnel diode,  
D405, and the current pulse switches D405 to the high-voltage state, which starts a sweep.  
D405, and the current pulse switches D405 to the high-voltage state, which starts a sweep.


==Links==
The 422 uses the [[T4220]] CRT.


==Pictures==
==Pictures==
=== External===
<gallery>
Tek 422 front.jpg
Tek 422 side.jpg
422 Rear No DC Opt.png | Rear face of 422 without DC battery option
Tek r422 1.jpg        | R422, compartment closed
Tek r422 2.jpg        | R422, compartment open
Black tek 422.jpg      | Black 422, panel mount
Tek 422 triag trace.jpg
Tek 422 tight beam.jpg | 422 trace is sharp
Tek_222_wtrace2.jpeg  | 422 in ALT
Tek 422 34.JPG
Tek 422 342.JPG
422 mpf102 cal.jpg
Wellenkino 422.jpg
DSC_7501_AC_cord.jpg  | AC Power Cord with UK Plug
DSC_7504_DC_cord.jpg  | DC Power Cord


</gallery>
=== Internal===
<gallery>
Tek_422-Ind-LHS.jpeg          | Tek 422 Internal LHS
Tek_422-Ind-RHS.jpeg          | Tek 422 Internal RHS
Tek_422-Ind-Top.jpeg          | Tek 422 Internal Top
Tek_422-Ind-Rear.jpeg        | Tek 422 Internal Rear
Tek_422-Ind-Under.jpeg        | Tek 422 Internal Underside
Tek_422-Ind-VAmp.jpeg        | Tek 422 Internal V-Amp
Tek_422-Ind-H-Amp.jpeg        | Tek 422 H-Amp Board
Tek_422-Ind-Trigger.jpeg      | Tek 422 Trigger Board
Tek_422-Ind-Input-Board1.jpeg | Tek 422 Input Board#1
Tek_422-Input-Board2.jpeg    | Tek 422 Input Board#1
Tek_422-Ind-Regulator.jpeg    | Tek 422 Indicator unit - Regulator
Tek_422-Ind-HV.jpeg          | Tek 422 HV Case
422 8056 mpf102.jpg          | [[MPF102]] replacing [[8056]]
Tek_422-AC-PS.jpeg            | Tek422 AC Power Supply Module
Tek_422-AC-PS-Int1.jpeg      | Tek 422 AC Power supply Internal
Tek_422-AC-PS2.jpeg          | Tek 422 AC Power supply Internal
Tek_422-AC-PS3.jpeg          | Tek 422 AC Power supply Internal
Tek_422-AC-PS4.jpeg          | Tek 422 AC Power supply Internal
Tek_422-AC-PS5.jpeg          | Tek 422 AC Power supply Internal
Tek 422 front part rear.jpg
Tek 422 left int.jpg
Tek 422 ps.jpg
Tek 422 right int.jpg
Tek 422 top.jpg
Tek 422 trig int.jpg
Tek 422 vert amp.jpg
Tek 422 vert amp2.jpg
Tek 422 vert input amps.jpg
Tek_422-Ind-PS-TP.jpeg        | Tek 422 Indicator unit, Power supply Test points
</gallery>
=== Schematic===
<gallery>
<gallery>
File:Tek 422 front.jpg
Tek 422 trigger.png | Trigger circuit
File:Tek 422 side.jpg
Tek 422 sweep.png   | Sweep circuit
File:Tek 422 trigger.png|Trigger circuit
Tek 422 vertamp.png | Vertical amplifier circuit
File:Tek 422 sweep.png|Sweep circuit
Tek 422 inputamp.png | Input amplifier circuit
File:Tek 422 vertamp.png|Vertical amplifier circuit
Tek 422 horizamp.png | Horizontal amplifier circuit
File:Tek 422 inputamp.png|Input amplifier circuit
Tek 422 crt.png     | CRT circuit
File:Tek 422 horizamp.png|Horizontal amplifier circuit
Tek-422 lvps2.png   | ac-dc power supply
File:Tek 422 crt.png|CRT circuit
Tek 422 acps.png     | ac power supply
File:422 mpf102 cal.jpg
File:Tek 422 front part rear.jpg
File:Tek 422 left int.jpg
File:Tek 422 ps.jpg
File:Tek 422 right int.jpg
File:Tek 422 top.jpg
File:Tek 422 trig int.jpg
File:Tek 422 vert amp.jpg
File:Tek 422 vert amp2.jpg
File:Tek 422 vert input amps.jpg
File:Tek-422 lvps2.png|ac-dc power supply
File:Tek 422 acps.png|ac power supply
File:422 8056 mpf102.jpg|[[MPF102]] replacing [[8056]]
File:Wellenkino 422.jpg
File:Tek 422 34.JPG
File:Tek 422 342.JPG
File:Tek r422 1.jpg|R422, compartment closed
File:Tek r422 2.jpg|R422, compartment open
Black tek 422.jpg|Black 422, panel mount
Tek 422 triangle wave.jpg
</gallery>
</gallery>
==Components==
{{Parts|422}}


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

Latest revision as of 06:54, 10 January 2024

Tektronix 422
15 MHz portable dual-trace scope
Tektronix 422 front

Produced from 1965 to 1975

Manuals
Manuals – Specifications – Links – Pictures

The Tektronix Type 422 is a 15 MHz portable dual-trace oscilloscope introduced in 1966. It was available with an optional battery back for operation without mains power.

Key Specifications

Bandwidth DC to 15 MHz
Risetime < 23 ns
Sweep 500 ns/div to 0.5 s/div
Input impedance 1 MΩ ±2% // 30 pF
Delay line 150 ns, internal delay line
 Input voltage Max. 300 V combined DC and peak AC
Trigger source CH1 & CH2, CH1, External
Channel isolation 100:1 at 40 KHz
Calibrator ~1 kHz ±20%, 2 V ext jack, 0.2 V internal, square wave
CRT T4220 tube, P31 phosphor, 6 kV acceleration (Post-def 4.9 kV), 8 × 10  graticule, 0.8 cm/div
Operating temperature –15 °C to +55 °C
Power AC PS, 110/115/125 or 210/230/250 VAC ±10%, 45 Hz to 440 Hz, 40 W
AC-DC PS, 92–137 or 184–274 VAC, 45 Hz to 440 Hz, 11.5–35 V DC, 30 W
Dimensions AC PS (H/W/D) 6.75/10.0/17.8 inches, AC-DC PS (H/W/D) 6.75/10.0/20.7 inches

Links

Documents Referencing 422

Document Class Title Authors Year Links
Tekscope 1969 V1 N4 Aug 1969.pdf Article Nickel-Cadmium Battery Rev1ew 1969 321A • 323 • 410 • 422

Internals

Early versions use an 8056 Nuvistor tube for the front-end cathode follower. Later versions use a FET front end. The 8056 Nuvistor used in the input amplifier of the 422 can be replaced by a MPF102 JFET.

The trigger circuit in the 422 has a trigger amplifier driving a 1N3719 tunnel diode, D375, which acts as a Schmitt trigger. The trigger amplifier has a nonlinear deadband diode circuit in the negative feedback path. What results is high gain for small signals (little or no negative feedback) and low gain for large signals (strong negative feedback). Thus, the signal at the base of Q364 has a limited swing over a wide range of input amplitudes. The collector current of Q364 varies between 0 and 9 mA. Depending on the position of the trigger slope control, higher collector current in Q364 either switches D375 from the low-voltage state to the high-voltage state or from the high-voltage state to the low-voltage state. When D375 transitions from the low-voltage state to the high-voltage state, it produces a current pulse in the primary of transformer T401, which produces a current pulse in the secondary of T401. The secondary of T401 feeds another tunnel diode, D405, and the current pulse switches D405 to the high-voltage state, which starts a sweep.

The 422 uses the T4220 CRT.

Pictures

External

  • Rear face of 422 without DC battery option

    Rear face of 422 without DC battery option

  • R422, compartment closed

    R422, compartment closed

  • R422, compartment open

    R422, compartment open

  • Black 422, panel mount

    Black 422, panel mount

  • 422 trace is sharp

    422 trace is sharp

  • 422 in ALT

    422 in ALT

  • AC Power Cord with UK Plug

    AC Power Cord with UK Plug

  • DC Power Cord

    DC Power Cord

Internal

  • Tek 422 Internal LHS

    Tek 422 Internal LHS

  • Tek 422 Internal RHS

    Tek 422 Internal RHS

  • Tek 422 Internal Top

    Tek 422 Internal Top

  • Tek 422 Internal Rear

    Tek 422 Internal Rear

  • Tek 422 Internal Underside

    Tek 422 Internal Underside

  • Tek 422 Internal V-Amp

    Tek 422 Internal V-Amp

  • Tek 422 H-Amp Board

    Tek 422 H-Amp Board

  • Tek 422 Trigger Board

    Tek 422 Trigger Board

  • Tek 422 Input Board#1

    Tek 422 Input Board#1

  • Tek 422 Input Board#1

    Tek 422 Input Board#1

  • Tek 422 Indicator unit - Regulator

    Tek 422 Indicator unit - Regulator

  • Tek 422 HV Case

    Tek 422 HV Case

  • MPF102 replacing 8056

    MPF102 replacing 8056

  • Tek422 AC Power Supply Module

    Tek422 AC Power Supply Module

  • Tek 422 AC Power supply Internal

    Tek 422 AC Power supply Internal

  • Tek 422 AC Power supply Internal

    Tek 422 AC Power supply Internal

  • Tek 422 AC Power supply Internal

    Tek 422 AC Power supply Internal

  • Tek 422 AC Power supply Internal

    Tek 422 AC Power supply Internal

  • Tek 422 AC Power supply Internal

    Tek 422 AC Power supply Internal

  • Tek 422 Indicator unit, Power supply Test points

    Tek 422 Indicator unit, Power supply Test points

Schematic

  • Trigger circuit

    Trigger circuit

  • Sweep circuit

    Sweep circuit

  • Vertical amplifier circuit

    Vertical amplifier circuit

  • Input amplifier circuit

    Input amplifier circuit

  • Horizontal amplifier circuit

    Horizontal amplifier circuit

  • CRT circuit

    CRT circuit

  • ac-dc power supply

    ac-dc power supply

  • ac power supply

    ac power supply

Components

Some Parts Used in the 422

Part Part Number(s) Class Description Used in
1N3714 152-0081-00 Discrete component 2.2 mA, 25 pF germanium tunnel diode 546 • 547 • 556 • 21A • 22A • 3B1 • 3B2 • 3B3 • 422 • 491 • 283
1N3719 152-0182-00 Discrete component 10 mA, 50 pF germanium tunnel diode 422 • 661 • 7B92 • 7B92A
8056 154-0417-00 Vacuum Tube (Triode) low-voltage Nuvistor triode 422 • 502 • W • 1S1 • 3A7 • 3S3 • 3T4 • 5T3 • 10A1
STD933 152-0181-00 Discrete component 1 mA, 5 pF germanium tunnel diode 1S2 • 221 • 422
T4220 154-0466-00 • 154-0466-05 CRT rectangular 3⅜ × 3⅞ flat-faced CRT 422
TD714 152-0402-00 Discrete component 2.2 mA, 25 pF tunnel diode 1401 • 1401A • 283 • R283 • 3B2 • 3B3 • 422 • 491 • 546 • RM546 • 547 • RM547 • 556 • RM556 • SPG11 • SPG12
ZZ1000 154-370 • 154-0370-00 Gas Discharge Tube (Voltage regulator) 81 V voltage reference 129 • 3B1 • 3B1S • 3B2 • 3B3 • 3S76 • 422 • S-311
Retrieved from "https://w140.com/tekwiki/index.php?title=422&oldid=90353"