If you get the "Sorry, the file cannot be displayed. There seems to be a technical issue ..." error when trying to view an image, please make sure you access the site at http://w140.com/tekwiki/, not www.w140.com/tekwiki/ (with "www"). Sorry for the inconvenience - we are looking for a generic solution.


From TekWiki
Jump to: navigation, search

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 +120 V DC, and unregulated +6.3 V DC. Low voltage rectification is done by a selenium rectifier. Higher voltage rectification is done by a 6X4 tube. The voltage reference for the +120 V supply is produced by a 5651 tube.