WARNING: Tube/Valve amplifiers use potentially LETHAL HIGH VOLTAGES.
Building, troubleshooting and testing of these amplifiers should only be
performed by someone who is thoroughly familiar with
the safety precautions around high voltages.
We are just starting to get out and onto the forums on the web to be communicate with our customers, when I ran across your post through a search containing our name. I would like to say thank you for considering The Tube Center for your product needs and let me just say we offer a huge selection of products and all of our tubes are tested prior to shipping. Most of our stock is NOS/NIB and all test 85% or better. Plus if you are unhappy with your purchase just send it back and we will replace it.