Hi, Gellis1,I have been getting consistent quality of 6922, among other tubes, from a seller by the name of Dioto here on the gon .Seimans gold pin,Dutch made Amperex bugel boys and Dutch Philips miniwatt S.Q.s,all very very good in my Supratek Chenin.The Philips miniwatt special quality are king in my set up right now.Dioto [Tom], Has a long retired tube technician working for him that really knows this technology..... Toms prices and service are tough to beat,I am very pleased with all that I bought from him.