160: Difference between revisions

|caption=System consisting of 161, 162, 160A and 360 modules (left to right)

* [[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.)

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 or 1953 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.

(The [[122|Type 122]] amplifier modules that also use octal power connectors are not compatible as they use quite different voltages.)

{{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?''}}

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 160 power supply was produced with serial numbers 101-619.

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 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.

===160===

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

===160A===

Tek 160A Back1.jpeg            | 160A Power supply

Tek 160A-Rear.png              | 160A Power supply, rear

Tek 160A-RHS.jpeg              | 160A Power supply, right

</gallery>

===Instruments===

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