Welcome to Effectrode

Effectrode is the last word in Tone! - Guitar effects pedals crafted using handselected
miniature or N.O.S. subminiature vacuum tubes and finest audio-grade components.

Effectrode Store

Signal Tubes

This excellent detailed drawing is taken from the 1950 edition of the RCA Receiving Tube Manual which clearly shows the internal construction of a B9A miniature signal tube. You can download a copy of the complete Receiving Tube Manual as a pdf further down this page. The size is 14MB.

Internal structure of a vacuum tube