John K. Bennett

Archuleta Professor of Computer Science, CU Boulder (retired)


An Open Letter to the Editor of CACM:

Let’s Lose the Terms “Master” and “Slave” From the Engineering Lexicon


How to Reach Me

Contact Information:

EMail: (jkb<at-sign>


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Repair/Restoration of Tektronix Test Equipment

In retirement, I have renewed my interest in electronics. Most recently, this has manifested itself in the repair of older Tektronix oscilloscopes and the test equipment used to calibrate them. Here are two projects I have completed.


·        Analysis and Repair of the TDS 7104/7404 Power Supply Unit Front End


·        Design and Implementation of a Substitute for the SG503 Peak-to-peak Detector

(Part no. 155-0107-00)



I weave in a traditional weft-faced Rio Grande style, using primarily Churro wool.   There are some great examples at the Millicent Rogers Museum in Taos.   I learned to weave reading Rachel Brown's wonderful book on weaving, and studied at the Taos Institute of the Arts, which sadly, has closed.   My teacher, Rose Vigil, is still teaching and weaving.  You can visit her shop, Los Vigiles Living Traditions, in Chimayo, NM.   I also learned a lot from the weavers at Tierra Wools in Los Ojos, NM, who graciously let me watch them weave and dye, and patiently answered my many questions.   Weaving Southwest, founded by Rachael Brown and located in Taos, was an excellent supplier of wool, and their gallery of textiles was inspiring, which has closed.  Locally, Schacht Looms are made in Boulder.  The folks at Schacht were also very patient, and let me study their looms so I could design and build my own.  Then they built a custom version of their classic Cranbrook loom for me.  Shuttles, Spindles and Skeins in Boulder is a great provider of supplies and wool other than Churro, and is also staffed by really friendly folks. Sadly, they are also about to close.  Maybe Ghandi was right about spinning and weaving.

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