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The Tektronix 160 series is a modular oscilloscope made from the mid 1950's
{{Oscilloscope Sidebar
(schematics drawn in [[introduced in 1953|1953]]) to the late 1960's (in 1969 catalog).
|manufacturer=Tektronix
A 160 series system typically includes a Type 160 power supply, a [[360|Type 360 indicator unit]], and one or more of the [[161]], [[162]], and [[163]] trigger and sweep modules. Each module is the size of a small shoe box.   
|model=160
Power connections are made behind the modules using cables that have  
|series=160
[[connectors|octal connectors]].   
|summary=Modular Oscilloscope
The power cables can be connected in a star topology (Type 160 in the center)  
|image=Tek_160a_360_161_162_trace.jpg
or can be daisy-chained using the loop-through connection on the back of each module.  
|caption=System consisting of 161, 162, 160A and 360 modules (left to right)
|introduced=1952
|discontinued=1970
|designers=Dick Ropiequet
|manuals=
* [[Media:Tek_160-1953_Catalog.pdf | 160 Description from 1953 catalog]]
* [[Media:070-067.pdf|Tektronix 160A Manual 070-067]] (1959 rev.)
* [[Media:070-220.pdf|Tektronix 160-series Manual 070-220]] (1960 rev.)
* [[Media:070-0220-01.pdf|Tektronix 160-series Manual 070-0220-01]] (1968 rev.)
* [[Media:Tek_360_160_irb.pdf|Tektronix 160-series Instrument Reference Book]] (OCR, 210MB!)
* [https://archive.org/download/tek_160a/tek_160a.pdf Tektronix 160A Manual]
* [[Media:Tek 160a fcp.pdf|Tektronix 160a Factory Calibration Procedure]] (OCR)
}}
The '''Tektronix 160 series''' is a modular instrument system designed to generate timed pulses of variable amplitude and width for use in nerve stimulation/neurophysical experiments.  It was designed by [[Dick Ropiequet]] and made from 1952 until at least 1970 (appearing in the catalog for that year but not subsequent years, though limited production may have continued).  
 
A 160 series system typically includes a Type 160 or 160A power supply, a [[360|Type 360 indicator unit]], and one or more of the [[161]], [[162]], and [[163]] trigger and sweep modules. There is also a single-unit power supply, the [[126]]. The height of each module is 7U (seven rack units), and they can be installed in the FA 160 mounting frame.
 
Each module is the size of a small shoe box.  Power connections are made behind the modules using [[W160|Type W160]] cables that have [[octal connector]]s.   
The power cables can be connected in a star topology (Type 160 in the center) or can be daisy-chained using the loop-through connection on the back of each module.  
(The [[122|Type 122]] amplifier modules that also use octal power connectors are not compatible as they use quite different voltages.)
 
Signal connections are made on the front, typically with banana plugs.   
Signal connections are made on the front, typically with banana plugs.   
The 160, 161, 162, and 163 use the ceramic strip and silver solder construction style
that is prevalent in other Tektronix equipment of the era, such as the 500-series scopes like the [[545]].
The Type 360 indicator unit contains the CRT HV power supply and the vertical amplifier
and is constructed using a single-sided printed circuit board.


In a typical setup, the input signal is fed through a splitter  
In a typical setup, the input signal is fed through a splitter to the Y-input of the 360 and the trigger input of the 161.   
to the Y-input of the 360 and the trigger input of the 161.   
The 161 generates a trigger pulse that controls a 162, which generates the horizontal ramp for the sweep.   
The 161 generates a trigger pulse that controls a 162,  
which generates the horizontal ramp for the sweep.   
This ramp signal is sent to the 360 horizontal input.   
This ramp signal is sent to the 360 horizontal input.   
The signals on the front panel of the 160-series modules are all single-ended. 
The 360 has a phase splitter to generate the differential drive for the horizontal deflection plates.
The 360 uses a standard [[3WP|3WP series 3-inch CRT]]. 
The cathode voltage is -1850 volts.  No post-deflection acceleration is used.


The 160 power supply was produced with serial numbers 101-619.
The signals on the front panel of the 160-series modules are all single-ended.
 
According to the May 1952 issue of Tek Talk (page 6), the 160 Series entered limited production in April of 1952.
 
{{BeginSpecs}}
{{Spec | +300 V output | DC, unregulated, 170 mA (160A: 250 mA) max}}
{{Spec | +225 V output | DC, regulated, 125 mA (160A: 175 mA) max }}
{{Spec | +150 V output | DC, regulated, 5 mA (160A: 15 mA) max }}
{{Spec | −170 V output | DC, regulated, 125 mA max }}
{{Spec |  6.3 V output | AC, unregulated, 10 (160A: 20 A) A max }}
{{Spec |  +70 V output | 160A only; DC, unregulated ''max load?''}}
{{EndSpecs}}
 
==Links==
* [https://vintagetek.org/160-series-instruments/ 160 @ Vintage Tek]
{{Documents|Link=160}}
{{PatentLinks|160}}
{{Documents|Link=160A}}
{{PatentLinks|160A}}
 
==Internals==
The 160A and 163 use the [[ceramic strip]] and [[silver-bearing solder]] construction style that is prevalent in other Tektronix equipment of the era, such as the 500-series scopes like the [[545]].  The 160, 161, and 162 utilize point-to-point construction with bus wiring rather than ceramic strips.
 
The Type 360 indicator unit contains the CRT HV power supply and the vertical amplifier. 
It was initially constructed using a printed circuit board, but later changed back to ceramic strips when it was discovered that the early double-sided PCB process that used riveted eyelets proved to be unreliable due to thermal expansion and oxidation issues. (The [[310]] had the same problem.)
 
The 360 uses a standard [[3WP|3WP series 3-inch CRT]], with a phase splitter to generate the differential drive for the horizontal deflection plates.
The cathode voltage is −1850 V.  No post-deflection acceleration is used.
 
The 160 power supply was produced with serial numbers 101-619.
For serial numbers 620 and up, it is slightly different and is called the 160A.   
For serial numbers 620 and up, it is slightly different and is called the 160A.   
The 160 and 160A both use a [[5V4]] rectifier tube for the negative voltage  
 
and two 5V4 tubes in parallel for the positive voltage.
The 160 and 160A both use a [[5V4]] rectifier tube for the negative voltage, and two 5V4 tubes in parallel (5V4/V8 added in parallel from SN > 324) for the positive voltage.  
Both use [[5651]] 87-volt reference tubes.   
The 5V4s were replaced with [[5AR4]] from SN 10250. Both use [[5651]] 87-volt reference tubes.   
 
The 160 and 160A differ in their output regulator circuits.   
The 160 and 160A differ in their output regulator circuits.   
The 160 uses a [[6AS7]] dual-triode tube, one half to regulate the +225V output  
The 160 uses a [[6AS7]] dual-triode tube, one half to regulate the +225 V output, and the other half to regulate the −170 V.
and the other half to regulate the -170V output. The 160A uses both halves of a  
The 160A uses both halves of a [[6080]] dual triode in parallel to regulate the +225 V output, and two parallel [[12B4]] triodes to regulate the −170 V.
[[6080]] dual-triode in parallel to regulate the +225V output,  
and two parallel [[12B4]] triodes to regulate the -170V output.


* [http://bama.edebris.com/download/tek/160/tek%20160.pdf Tektronix 160-series Manual (PDF)]
==Pictures ==
===160===
<gallery>
Tek160_front.jpeg              | 160 front, SN 307
Tek160_iso.jpeg                | 160 side
Tek160_top.jpeg                | 160 top, showing two [[5V4]] rectifiers
Tek160_rear.jpeg              | 160 rear
Tek160_underside.jpeg          | 160 bottom
Tek 160 schem.png              | 160 schematic
Type-160 TekTalk May1952.jpg  | 160 introduction in TekTalk May 1952
</gallery>


===160A===
<gallery>
<gallery>
Image:Tek 160 dn1.jpg|photo courtesy of Dave Nicol
Tek 160A Front.jpeg            | 160A Power supply, front
Image:Tek 160 dn2.jpg|photo courtesy of Dave Nicol
Tek 160A Front1.jpeg          | 160A Power supply
Image:Tek 160 schem.png|160 schematic
Tek 160A Back1.jpeg            | 160A Power supply
Image:Tek 160a schem.png|160A schematic
Tek 160A-Rear.png             | 160A Power supply, rear
Tek 160A-RHS.jpeg              | 160A Power supply, right
Tek 160A Underside.jpeg        | 160A Power supply, underside
Tek 160a schem.png             | 160A schematic
</gallery>
</gallery>


[[Category:Introduced in 1953]]
===Instruments===
<gallery>
Tek 160 dn1.jpg                | Frame with 162, 161, 163, and 160A (photo courtesy of Dave Nicol)
Tek 160 dn2.jpg                | Frame with 162, 161, 163, and 160A, rear view (photo courtesy of Dave Nicol)
Tek 160a 360 161 162 trace.jpg | 160 system in operation
Rack of 160-series modules.jpg
Tek 160 system 1.jpg
Tek 160 system 2.jpg
Tek 160 system 3.jpg
Tek 160 system 4.jpg
Tek 160 system 5.jpg
Tek 160 system 6.jpg
Tek 160 system 7.jpg
</gallery>
 
==Components==
{{Parts|160}}
 
[[Category:160 system]]

Latest revision as of 05:08, 29 October 2024

Tektronix 160
Modular Oscilloscope
System consisting of 161, 162, 160A and 360 modules (left to right)

Produced from 1952 to 1970

Manuals
Manuals – Specifications – Links – Pictures

The Tektronix 160 series is a modular instrument system designed to generate timed pulses of variable amplitude and width for use in nerve stimulation/neurophysical experiments. It was designed by Dick Ropiequet and made from 1952 until at least 1970 (appearing in the catalog for that year but not subsequent years, though limited production may have continued).

A 160 series system typically includes a Type 160 or 160A power supply, a Type 360 indicator unit, and one or more of the 161, 162, and 163 trigger and sweep modules. There is also a single-unit power supply, the 126. The height of each module is 7U (seven rack units), and they can be installed in the FA 160 mounting frame.

Each module is the size of a small shoe box. Power connections are made behind the modules using Type W160 cables that have octal connectors. The power cables can be connected in a star topology (Type 160 in the center) or can be daisy-chained using the loop-through connection on the back of each module. (The Type 122 amplifier modules that also use octal power connectors are not compatible as they use quite different voltages.)

Signal connections are made on the front, typically with banana plugs.

In a typical setup, the input signal is fed through a splitter to the Y-input of the 360 and the trigger input of the 161. The 161 generates a trigger pulse that controls a 162, which generates the horizontal ramp for the sweep. This ramp signal is sent to the 360 horizontal input.

The signals on the front panel of the 160-series modules are all single-ended.

According to the May 1952 issue of Tek Talk (page 6), the 160 Series entered limited production in April of 1952.

Key Specifications

+300 V output DC, unregulated, 170 mA (160A: 250 mA) max
+225 V output DC, regulated, 125 mA (160A: 175 mA) max
+150 V output DC, regulated, 5 mA (160A: 15 mA) max
−170 V output DC, regulated, 125 mA max
6.3 V output AC, unregulated, 10 (160A: 20 A) A max
+70 V output 160A only; DC, unregulated max load?

Links

Documents Referencing 160

(no results)

Documents Referencing 160A

(no results)

Internals

The 160A and 163 use the ceramic strip and silver-bearing solder construction style that is prevalent in other Tektronix equipment of the era, such as the 500-series scopes like the 545. The 160, 161, and 162 utilize point-to-point construction with bus wiring rather than ceramic strips.

The Type 360 indicator unit contains the CRT HV power supply and the vertical amplifier. It was initially constructed using a printed circuit board, but later changed back to ceramic strips when it was discovered that the early double-sided PCB process that used riveted eyelets proved to be unreliable due to thermal expansion and oxidation issues. (The 310 had the same problem.)

The 360 uses a standard 3WP series 3-inch CRT, with a phase splitter to generate the differential drive for the horizontal deflection plates. The cathode voltage is −1850 V. No post-deflection acceleration is used.

The 160 power supply was produced with serial numbers 101-619. For serial numbers 620 and up, it is slightly different and is called the 160A.

The 160 and 160A both use a 5V4 rectifier tube for the negative voltage, and two 5V4 tubes in parallel (5V4/V8 added in parallel from SN > 324) for the positive voltage. The 5V4s were replaced with 5AR4 from SN 10250. Both use 5651 87-volt reference tubes.

The 160 and 160A differ in their output regulator circuits. The 160 uses a 6AS7 dual-triode tube, one half to regulate the +225 V output, and the other half to regulate the −170 V. The 160A uses both halves of a 6080 dual triode in parallel to regulate the +225 V output, and two parallel 12B4 triodes to regulate the −170 V.

Pictures

160

  • 160 front, SN 307

    160 front, SN 307

  • 160 side

    160 side

  • 160 top, showing two 5V4 rectifiers

    160 top, showing two 5V4 rectifiers

  • 160 rear

    160 rear

  • 160 bottom

    160 bottom

  • 160 schematic

    160 schematic

  • 160 introduction in TekTalk May 1952

    160 introduction in TekTalk May 1952

160A

  • 160A Power supply, front

    160A Power supply, front

  • 160A Power supply

    160A Power supply

  • 160A Power supply

    160A Power supply

  • 160A Power supply, rear

    160A Power supply, rear

  • 160A Power supply, right

    160A Power supply, right

  • 160A Power supply, underside

    160A Power supply, underside

  • 160A schematic

    160A schematic

Instruments

  • Frame with 162, 161, 163, and 160A (photo courtesy of Dave Nicol)

    Frame with 162, 161, 163, and 160A (photo courtesy of Dave Nicol)

  • Frame with 162, 161, 163, and 160A, rear view (photo courtesy of Dave Nicol)

    Frame with 162, 161, 163, and 160A, rear view (photo courtesy of Dave Nicol)

  • 160 system in operation

    160 system in operation

Components

Some Parts Used in the 160

Part Part Number(s) Class Description Used in
120-0054-00 120-0054-00 Discrete component power transformer 160
12AU7 154-041 • 154-0041-00 • 154-0287-00 Vacuum Tube (Dual Triode) dual medium-μ triode 104 • 104A • 122 • 160 • 161 • 162 • 181 • 190 • 310 • 310A • 316 • 317 • 3C66 • 502 • 502A • 507 • 511A • 512 • 516 • 517 • 517A • 524 • 526 • 535 • 536 • 545 • 545A • 545B • 547 • 549 • 555 • 561 • 564 • 570 • 575 • 581 • 581A • 585 • 585A • C • D • E • N • Q • Hickok 1825
5651 154-052 • 154-0052-00 • 154-0288-00 Gas Discharge Tube (Voltage regulator) 87 V voltage reference 128 • 160 • 310 • 310A • 502 • 503 • 504 • 511A • 512 • 516 • 517 • 524 • 526 • 531 • 531A • 535 • 536 • 541 • 541A • 543 • 543A • 543B • 545 • 545A • 545B • 570 • 549 • 581 • 581A • 585 • 585A
5AR4 154-0168-00 Vacuum Tube (Dual Rectifier) dual rectifier 502 • 502A • 160
5V4G 154-008 • 154-0008-00 Vacuum Tube (Dual Rectifier) dual rectifier 104 • 104A • 160 • 511A • 514
6080 154-0056-00 • 154-0315-00 Vacuum Tube (Dual Triode) dual power triode 132 • 160 • 316 • 317 • 516 • 535 • 535A • RM35A • 541 • 541A • 535 • 536 • 545 • 545A • 545B • 546 • 547 • 549 • 565 • 567 • 575 • 581 • 581A • 585 • 585A
6AS7 154-020 • 154-0020-00 Vacuum Tube (Pentode) dual power triode 160 • 506 • 511A • 512 • 513 • 517 • 517A • 524 • 561 • 561A • 561S • 564
6AU6 154-0022-00 • 157-0073-00 • 157-0059-00 • 154-0284-00 Vacuum Tube (Pentode) RF pentode 107 • 160 • 181 • 190 • 60 • 2A60 • 72 • 3A72 • 3C66 • 310 • 310A • 316 • 317 • 360 • 502 • 502A • 506 • 511 • 511A • 512 • 513 • 516 • 517 • 517A • 524 • 526 • 529 • RM529 • 531 • 531A • 535 • 536 • 545 • 545A • 546 • 547 • 549 • 555 • 561 • 561A • 561S • 564 • 565 • 567 • 570 • 575 • 581 • 581A • 585 • 585A • 80 • C • CA • Q
6AW8 154-0095-00 Vacuum Tube (Triode/Pentode) triode-pentode combo 132 • 160 • 541 • 535 • 545
6U8 154-0033-00 Vacuum Tube (Triode/Pentode) triode-pentode combo 130 • 160 • 163 • 310 • 315 • 316 • 524 • 535 • 545 • T
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