128: Difference between revisions
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+120V DC, and unregulated +6.3V DC. Low voltage rectification is done by a | +120V DC, and unregulated +6.3V DC. Low voltage rectification is done by a | ||
[[selenium_rectifiers|selenium rectifier]]. Higher voltage rectification is done | [[selenium_rectifiers|selenium rectifier]]. Higher voltage rectification is done | ||
by a [[6X4]] tube. | 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)] | * [http://w140.com/tek_128.pdf Tektronix 128 Manual (PDF)] | ||
Revision as of 22:22, 26 August 2012
The Tektronix Type 128 is a power supply for Type P500CF cathode-follower probes. It was introduced in 1958. It provides two voltages to the probe: regulated +120V DC, and unregulated +6.3V DC. Low voltage rectification is done by a selenium rectifier. Higher voltage rectification is done by a 6X4 tube. The voltage reference for the +120V supply is produced by a 5651 tube.
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Catalog photo
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Schematic
