This image is a derivative work of the following images: File:Triode_tube_schematic.svg licensed with Cc-by-sa-2.5 2009-10-08T16:24:11Z Beao 612x792 (53543...
This image is a derivative work of the following images: File:Diode_tube_schematic.svg licensed with Cc-by-sa-2.5 2009-10-11T00:24:42Z Beao 612x792 (19822...
