Just in: the long awaited 1937 sequel to the 1927 bible on capacitor production by Philip R. Coursey that I posted a while ago. Even more details, materials and production methods, but now zooming in on electrolytic capacitors. I didn't realize Coursey was the technical director of Dubilier, the first commercial manufacturer of capacitors, which I believe is still in business 105 years after it was founded.

#capacitors #electrolyticCapacitors #Dubilier #79 #SystemsThatMatter