If you want to model a tube audio amplifier you will definitely need a 6SN7. The 6SN7 is a widely used electron tube (double triode) with an octal base, in which the triode systems of two 6J5 triodes were housed in a single tube for reasons of space economy. It appeared on the US tube market in 1939 as a steel tube, but only became established in 1941 as the 6SN7GT with a glass housing. Together with its many later variants, it played a similarly important role in the electronics industry in these years as its successors, the famous miniature double triodes with Noval sockets ECC81, ECC82 and ECC83. In the black and white television sets from the early television era, which were equipped with numerous tubes, the 6SN7 was one of the irreplaceable standard tubes in the tube industry because of its versatile application possibilities. The tube's best-known application was in the English Williamson amplifier, one of the first hi-fi amplifier concepts, and in the gigantic IBM-SAGE computer system of the 1950s. The professional version of the 6SN7 is the 5692 (RCA). I hope you have fun with the model and may your scenes be successful.