: Established sites like TubeDepot offer a wide range of current production tubes (JJ, Electro-Harmonix, Mullard reissue) and selected NOS options.
: Local "yard sales" or "ham radio" listings in local papers can sometimes yield large stashes of vintage tubes at low prices, though these are often untested. Engineer Reacts: Is MATCHING Vacuum Tubes a SCAM? buy vacuum tubes
For a helpful "paper" or guide on buying vacuum tubes, the following resources and key factors will help you navigate both new production and vintage (NOS) markets. Recommended Guides and Resources : Established sites like TubeDepot offer a wide