Links:

https://archive.org/search.php?query=forrest%20mims

https://en.wikipedia.org/wiki/Forrest_Mims

https://www.newark.com/mcm-partnership

https://www.allelectronics.com/

This is where I found the doubler circuit.

http://www.zpag.net/Electroniques/Kit/Radio_Shack_-_Engineer's_Mini-Notebook_-_Basic_Semiconductor_Circuits.pdf

Close approximation of my first transformer.

Power supplies I had in my teens.

Places I worked.

Manu-tronics

https://www.bizjournals.com/milwaukee/stories/1999/01/25/daily21.html

Bought out by Sanmina Corporation

https://www.sanmina.com/media-center/videos/kenosha-facility/

Baxter Healthcare

https://www.baxter.com/

Colleague 3 pump picture

https://drive.google.com/drive/folders/1tZlkSQi6gdpPc9UqGiDy2bzXuXcxZ-fl?usp=sharing

Illinois Instrument (Systech Illinois)

https://www.systechillinois.com/en/products/ec900-process-oxygen-analyser