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Revision as of 23:01, 25 August 2014
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
