Favorite electron tube circuit?

Is this what you want?

would love to find a pdf of the 2nd ed. Thanks John

One washer had a brush where it ran the water through into the wash tub. It seemed to work well.

Brilliant use of a tube designed for a different purpose. They were used as the ramp generator for horizontal sweep in oscilloscopes. Likely used in radars as well.

Jon

Yes it was. For a fascinating and informative reading of foundational radar technology, one might want to look at the books that came out of the MIT Rad Lab. PDFs can be found here:

Being a long time student of control theory, I looked at vol 25, Theory of Servomechanisms. The treatment of the theory is clear and complete and I was astounded to realize that my first control theory text book (affectionately paraphrased to "Dazzled and Hopeless" - I cant remember the actually spelling of the authors last names), contained almost a verbatim copy of the servomechanism volume. ahhh, the good times...

John