Analog Computers

I found that there is an interesting Analog Computer group on Facebook but I have not had a FB

Another new analog computer build: MARB-1. This one based on Dr. Vogel's machine. All open source

Using Google Translate, I bodged up a PDF in German to overlay in English. Original in German is here

As chance would have it, an article about the Gilbert cell multiplier just appeared. On Friday,

I tediously spent yesterday afternoon and evening testing the previous PWM multiplier prototype. I