Miscellaneous Tube Stuff

Here's an old German tube manual from 1934. Someone doodled on the cover.

This slide rule device showed the pinouts of octal tubes.

This GE book, along with the Radiotron book, was a right-hand tool for many years, along with the Pindexes.

The first time I thinned out my tube collection, this is what I got rid of.

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