Zoccolo Noval, 9 pin miniature (USA pico-9) B9A Utilizzata per Radio/TV-reception etc. Filamento Vf 6.3 Volt / If 0.6 Ampere / Indirect / Specified voltage AND current AC/DC Descrizione The 6BY8 made by US manufacturers is a noval Pentode-Diode tube. It is not to be confused with the 6BY8G introduced several years before, in the mid 1930s, by Italian Fivre.

The 6BY8 tube is an electronic vacuum tube (or thermionic valve) used in electronic devices, such as audio amplifiers or radio receivers. This tube is a dual triode type, meaning it contains two separate triode sections. Each section can be used to independently amplify signals.

The 6BY8 has been employed in various applications, and its presence is common in many electronic circuits from the time it was produced. Its dual triode configuration makes it versatile and suitable for amplifying signals in different modes.

If you have specific questions about the 6BY8 tube or how it is used in a particular circuit, feel free to let me know, and I'll be happy to provide you with additional information.