I thought you might like to see how your valves are made in the EHX Valve Factory. This is a video of the Electro-Harmonix  ( EHX) valve (tube) factory in Saratov in Russia. This factory originally made the valves for the Russian military. EHX claims this is the largest remaining tube factory in the world.  I believe it to be one of the largest. When you watch this video, you will see there is a