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{{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. | 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]]. | ||
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Low voltage rectification is done by a [[selenium_rectifiers|selenium rectifier]], plate voltage rectification by a [[6X4]] tube. | 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. | The voltage reference for the +120 V supply is produced by a [[5651]] tube. | ||
==Pictures== | ==Pictures== | ||
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[[Category:Accessory power supplies]] | [[Category:Accessory power supplies]] | ||
Latest revision as of 16:56, 20 November 2022
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.
Pictures
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Catalog photo
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Schematic
