Welcome to my 813 page

The 813 beam tetrode

The 813 is a beam tetrode, a type of thermionic valve, also known (mainly in the US) as a vacuum tube or electron tube. This wonderful old valve has a graphite anode, or plate, rated at something like 125 watts RMS dissipation.

The wonderful 813!

813 datasheet

The diagram above was shamelessly stolen from https://faculty.frostburg.edu/phys/latta/ee/wing813amp/813.html, the photo of the 813 was acquired years ago; source unknown, but both images will be replaced very soon.

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