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The Tektronix Type 128 is a power supply for Type [[P500CF]] cathode-follower probes.
The '''Tektronix Type 128''' is a power supply for up to two [[P500CF|Type P500CF]] or [[P170CF|Type P170CF]] cathode-follower probes.
It was [[introduced in 1958]].  It provides two voltages to the probe: regulated
It was [[introduced in 1958]].   
+120V DC, and unregulated +6.3V DC.  Low voltage rectification is done by a
[[selenium_rectifiers|selenium rectifier]].  Higher voltage rectification is done
by a [[6X4]] tube.  The voltage reference for the +120V supply is produced by
a [[5651]] tube.


* [http://w140.com/tek_128.pdf Tektronix 128 Manual (PDF)]
It provides three DC voltages − regulated +120 V @ 25 mA, and two independent unregulated +6.3 V @ 150 mA circuits, one for each probe socket.


Low voltage rectification is done by a [[selenium_rectifiers|selenium rectifier]], plate voltage rectification by a [[6X4]] tube. 
The voltage reference for the +120 V supply is produced by a [[5651]] tube.
==Links==
* [[Media:070-063.pdf|Tektronix Type 128 manual (PDF)]]
==Pictures==
<gallery>
<gallery>
Image:Tek 128 manphoto.jpg|Catalog photo
Tek 128 front.jpg
File:Tek 128 schematic.png|Schematic
Tek 128 front2.jpg
Tek 128 right.jpg
Tek 128 left.jpg
Tek 128 rear.jpg
Tek 128 manphoto.jpg|Catalog photo
Tek 128 schematic.png|Schematic
</gallery>
</gallery>
[[Category:Accessory power supplies]]
[[Category:Introduced in 1958]]

Revision as of 14:17, 30 October 2019

The Tektronix Type 128 is a power supply for up to two Type P500CF or Type P170CF cathode-follower probes. It was introduced in 1958.

It provides three DC voltages − regulated +120 V @ 25 mA, and two independent unregulated +6.3 V @ 150 mA circuits, one for each probe socket.

Low voltage rectification is done by a selenium rectifier, plate voltage rectification by a 6X4 tube. The voltage reference for the +120 V supply is produced by a 5651 tube.

Links

Pictures