432: Difference between revisions

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File:Tek_432_internal_8.jpg|Close up view of BNCs.  These need to be unsoldered for removal, but nothing else must be unsoldered to access/clean the vertical gain rotary switch.
File:Tek_432_internal_8.jpg|Close up view of BNCs.  These need to be unsoldered for removal, but nothing else must be unsoldered to access/clean the vertical gain rotary switch.
File:Tek_432_internal_9.jpg|View of the input preamp.  This board needs to be unplugged only, but not removed or unsoldered.  It has four 2-pin connectors.  Then it can be removed, still attached to the compensation capacitor carriers.
File:Tek_432_internal_9.jpg|View of the input preamp.  This board needs to be unplugged only, but not removed or unsoldered.  It has four 2-pin connectors.  Then it can be removed, still attached to the compensation capacitor carriers.
File:Tek_432_internal_10.jpg|
File:Tek_432_internal_10.jpg|Lifting off the assembly consisting of the 2 compensation capacitor carrier  plus the vertical preamp board  plus the  push-button switch board for CH1/CHOP/ALTERNATE/CH2.  The switch board has two plug connectors below that must be removed.  It helps to have long fingers or a good pair of needle nose pliers.
Lifting off the assembly consisting of the 2 compensation capacitor carrier  plus the vertical preamp board  plus the  push-button switch board for CH1/CHOP/ALTERNATE/CH2.  The switch board has two plug connectors below that must be removed.  It helps to have long fingers or a good pair of needle nose pliers.
File:Tek_432_internal_11.jpg|Second view under the assembly being removed.
File:Tek_432_internal_11.jpg|Second view under the assembly being removed.
File:Tek_432_internal_12.jpg|The rotary switches exposed. Each one has four contact fingers underneath.  They are cleaned using small (5mm) wide strips of paper soaked in isopropanol alcohol (2-propanol).
File:Tek_432_internal_12.jpg|The rotary switches exposed. Each one has four contact fingers underneath.  They are cleaned using small (5mm) wide strips of paper soaked in isopropanol alcohol (2-propanol).

Revision as of 14:30, 1 January 2015

{{{manufacturer}}} 
25 MHz dual trace portable scope
Tektronix 432

Produced from 1971 to (?)

Manuals
(All manuals in PDF format unless noted otherwise)
Manuals – Specifications – Links – Pictures

The Tektronix 432 is a 25 MHz dual-trace portable solid-state oscilloscope.

There is also a rack-mount version, the R432.

Each 432 vertical signal channel starts with the coupling switch, then a rotary cam attenuator, then a dual-JFET source-follower buffer amp, then a 155-0050-00 differential amplifier (switched to 155-0050-01 after serial number B239999).

The vertical and horizontal output amplifiers are fully discrete, using silicon bipolar transistors.

Triggering is done by a 4.7 mA tunnel diode that is fed by a discrete trigger amplifier.

The 432 consumes 55 watts maximum and weighs 20 pounds.

P31 phosphor was standard. P7 was also available.

Specifications

please add

Pictures