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The '''Tektronix Type 128''' is a power supply for Type [[ | {{Instrument Sidebar | ||
|manufacturer=Tektronix | |||
|model=128 | |||
|class=Power supply | |||
|series= | |||
|summary=Probe power supply | |||
|image=Tek 128 front.jpg | |||
|caption=Tektronix Type 128 | |||
|introduced=1958 | |||
|discontinued=(?) | |||
|designers= | |||
|manuals= | |||
* [[Media:070-063.pdf|Tektronix Type 128 manual]] (PDF) | |||
* [[Media:Tek 128 dummy load.pdf|Tektronix Type 128 Dummy Load]] | |||
}} | |||
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 was [[introduced in 1958]]. | ||
It provides | 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. | ||
+120 V | |||
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. | |||
==Pictures== | |||
<gallery> | <gallery> | ||
Tek 128 front.jpg | |||
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:Accessory power supplies]] | ||